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Chen B, Ding L, Qin Q, Lei TH, Girard O, Cao Y. Effect of caffeine ingestion on time trial performance in cyclists: a systematic review and meta-analysis. J Int Soc Sports Nutr 2024; 21:2363789. [PMID: 38836626 PMCID: PMC11155427 DOI: 10.1080/15502783.2024.2363789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Accepted: 05/29/2024] [Indexed: 06/06/2024] Open
Abstract
BACKGROUND Caffeine, widely recognized as an ergogenic aid, has undergone extensive research, demonstrating its effectiveness to enhance endurance performance. However, there remains a significant gap in systematically evaluating its effects on time trial (TT) performance in cyclists. PURPOSE This meta-analysis aimed to determine the efficacy of caffeine ingestion to increase cycling TT performance in cyclists and to evaluate the optimal dosage range for maximum effect. METHODS A search of four databases was completed on 1 December 2023. The selected studies comprised crossover, placebo-controlled investigations into the effects of caffeine ingestion on cycling TT performance. Completion time (Time) and mean power output (MPO) were used as performance measures for TT. Meta-analyses were performed using a random-effects model to assess the standardized mean differences (SMD) in individual studies. RESULTS Fifteen studies met the inclusion criteria for the meta-analyses. Subgroup analysis showed that moderate doses of caffeine intake (4-6 mg/kg) significantly improved cycling performance (SMD Time = -0.55, 95% confidence interval (CI) = -0.84 ~ -0.26, p < 0.01, I2 = 35%; SMD MPO = 0.44, 95% CI = 0.09 ~ 0.79, p < 0.05, I2 = 39%), while the effects of low doses (1-3 mg/kg) of caffeine were not significant (SMD Time = -0.34, 95% CI = -0.84 ~ 0.17, p = 0.19, I2 = 0%; SMD MPO = 0.31, 95% CI = -0.02 ~ 0.65, p = 0.07, I2 = 0%). CONCLUSION A moderate dosage (4-6 mg/kg) of caffeine, identified as the optimal dose range, can significantly improve the time trial performance of cyclists, while a low dose (1-3 mg/kg) does not yield improvement. In addition, the improvements in completion time and mean power output resulting from a moderate dose of caffeine are essentially the same in cycling time trails.
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Affiliation(s)
- Bin Chen
- Fujian Agriculture and Forestry University, Department of Public Physical Education, Fuzhou, China
| | - Li Ding
- Shanghai University of Sport, School of Physical Education, Shanghai, China
| | - Qiyang Qin
- Shanghai University of Sport, School of Athletic Performance, Shanghai, China
| | - Tze-Huan Lei
- Hubei Normal University, College of Physical Education, Huangshi, China
| | - Olivier Girard
- The University of Western Australia, School of Human Sciences (Exercise and Sport Science), Perth, Australia
| | - Yinhang Cao
- Shanghai University of Sport, School of Athletic Performance, Shanghai, China
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Antonio J, Newmire DE, Stout JR, Antonio B, Gibbons M, Lowery LM, Harper J, Willoughby D, Evans C, Anderson D, Goldstein E, Rojas J, Monsalves-Álvarez M, Forbes SC, Gomez Lopez J, Ziegenfuss T, Moulding BD, Candow D, Sagner M, Arent SM. Common questions and misconceptions about caffeine supplementation: what does the scientific evidence really show? J Int Soc Sports Nutr 2024; 21:2323919. [PMID: 38466174 DOI: 10.1080/15502783.2024.2323919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Accepted: 02/17/2024] [Indexed: 03/12/2024] Open
Abstract
Caffeine is a popular ergogenic aid that has a plethora of evidence highlighting its positive effects. A Google Scholar search using the keywords "caffeine" and "exercise" yields over 200,000 results, emphasizing the extensive research on this topic. However, despite the vast amount of available data, it is intriguing that uncertainties persist regarding the effectiveness and safety of caffeine. These include but are not limited to: 1. Does caffeine dehydrate you at rest? 2. Does caffeine dehydrate you during exercise? 3. Does caffeine promote the loss of body fat? 4. Does habitual caffeine consumption influence the performance response to acute caffeine supplementation? 5. Does caffeine affect upper vs. lower body performance/strength differently? 6. Is there a relationship between caffeine and depression? 7. Can too much caffeine kill you? 8. Are there sex differences regarding caffeine's effects? 9. Does caffeine work for everyone? 10. Does caffeine cause heart problems? 11. Does caffeine promote the loss of bone mineral? 12. Should pregnant women avoid caffeine? 13. Is caffeine addictive? 14. Does waiting 1.5-2.0 hours after waking to consume caffeine help you avoid the afternoon "crash?" To answer these questions, we performed an evidence-based scientific evaluation of the literature regarding caffeine supplementation.
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Affiliation(s)
- Jose Antonio
- Nova Southeastern University, Department of Health and Human Performance, Davie, FL, USA
| | - Daniel E Newmire
- Texas Woman's University, Exercise Physiology and Biochemistry Laboratory, School of Health Promotion and Kinesiology, Denton, TX, USA
| | - Jeffrey R Stout
- University of Central Florida, College of Health Professions and Sciences, Orlando, FL, USA
| | - Brandi Antonio
- University of Central Florida, College of Health Professions and Sciences, Orlando, FL, USA
| | | | - Lonnie M Lowery
- Nutrition, Exercise and Wellness Associates, Cuyahoga Falls, OH, USA
- Walsh University, Department of Exercise Science, North Canton, OH, USA
| | - Joseph Harper
- Walsh University, Department of Exercise Science, North Canton, OH, USA
| | - Darryn Willoughby
- School of Exercise and Sport Science, University of Mary Hardin-Baylor, Belton, TX, USA
| | - Cassandra Evans
- Nova Southeastern University, Department of Health and Human Performance, Davie, FL, USA
| | - Dawn Anderson
- Indiana Tech, Exercise and Sport Performance Laboratory, Fort Wayne, IN, USA
| | - Erica Goldstein
- Stetson University, Department of Health Sciences, Deland, FL, USA
| | - Jose Rojas
- Keiser University, Fort Lauderdale, FL, USA
- Rocky Mountain University of Health Professions, Provo, UT, USA
| | - Matías Monsalves-Álvarez
- Universidad de O´Higgins, Exercise Metabolism and Nutrition Laboratory. Instituto de Ciencias de la Salud, Rancagua, Chile
- Motion Human Performance Laboratory, Lo Barnechea, Chile
| | - Scott C Forbes
- Brandon University, Department of Physical Education Studies, CBrandon, MB, Canada
| | | | - Tim Ziegenfuss
- The Center for Applied Health Sciences, Canfield, OH, USA
| | - Blake D Moulding
- University of Regina, Faculty of Kinesiology and Health Studies, Regina, SK, Canada
| | - Darren Candow
- University of Regina, Faculty of Kinesiology and Health Studies, Regina, SK, Canada
| | | | - Shawn M Arent
- University of South Carolina, Arnold School of Public Health, Columbia, SC, USA
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Takamata A, Oka A, Nagata M, Kosugi N, Eguchi S, Sakagawa N, Takahashi A, Nishimoto Y, Nishimaki M, Morimoto K, Takihara T. Effect of fluid replacement with green tea on body fluid balance and renal responses under mild thermal hypohydration: a randomized crossover study. Eur J Nutr 2023; 62:3339-3347. [PMID: 37594507 DOI: 10.1007/s00394-023-03236-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Accepted: 08/08/2023] [Indexed: 08/19/2023]
Abstract
PURPOSE Maintaining an appropriate hydration level by ingesting fluid in a hot environment is a measure to prevent heat-related illness. Caffeine-containing beverages, including green tea (GT), have been avoided as inappropriate rehydration beverages to prevent heat-related illness because caffeine has been assumed to exert diuretic/natriuretic action. However, the influence of caffeine intake on urine output in dehydrated individuals is not well documented. The aim of the present study was to examine the effect of fluid replacement with GT on body fluid balance and renal water and electrolyte handling in mildly dehydrated individuals. METHODS Subjects were dehydrated by performing three bouts of stepping exercise for 20 min separated by 10 min of rest. They were asked to ingest an amount of water (H2O), GT, or caffeinated H2O (20 mg/100 ml; Caf-H2O) that was equal to the volume of fluid loss during the dehydration protocol; fluid balance was measured for 2 h after fluid ingestion. RESULTS The dehydration protocol induced hypohydration by ~ 10 g/kg body weight (~ 1% of body weight). Fluid balance 2 h after fluid ingestion was significantly less negative in all trials, and the fluid retention ratio was 52.2 ± 4.2% with H2O, 51.0 ± 5.0% with GT, and 47.9 ± 6.2% with Caf-H2O; those values did not differ among the trials. After rehydration, urine output, urine osmolality, and urinary excretions of osmotically active substances, sodium, potassium and chloride were not different among the trials. CONCLUSION The data indicate that ingestion of GT or an equivalent caffeine amount does not worsen the hydration level 2 h after ingestion and can be effective in reducing the negative fluid balance for acute recovery from mild hypohydration. TRIAL REGISTRATION ISRCTN53057185; retrospectively registered.
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Affiliation(s)
- Akira Takamata
- Department of Environmental Health, Nara Women's University, Nara, Japan.
| | - Ayano Oka
- Department of Environmental Health, Nara Women's University, Nara, Japan
| | - Mayuna Nagata
- Department of Environmental Health, Nara Women's University, Nara, Japan
| | - Natsumi Kosugi
- Department of Environmental Health, Nara Women's University, Nara, Japan
| | - Sayaka Eguchi
- Department of Environmental Health, Nara Women's University, Nara, Japan
| | - Nanako Sakagawa
- Department of Environmental Health, Nara Women's University, Nara, Japan
| | - Aoi Takahashi
- Department of Environmental Health, Nara Women's University, Nara, Japan
| | - Yuki Nishimoto
- Department of Environmental Health, Nara Women's University, Nara, Japan
| | - Mio Nishimaki
- Department of Environmental Health, Nara Women's University, Nara, Japan
| | - Keiko Morimoto
- Department of Environmental Health, Nara Women's University, Nara, Japan
- Department of Health and Nutrition, Kyoto Koka Women's University, Kyoto, Japan
| | - Takanobu Takihara
- Central Research Institute, ITO EN, Ltd., Makinohara, Shizuoka, Japan
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Picó-Munyoz R, Tárrega A, Laguna L. Origins of thirstiness sensation and current food solutions. Compr Rev Food Sci Food Saf 2023; 22:4433-4450. [PMID: 37583300 DOI: 10.1111/1541-4337.13229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 06/15/2023] [Accepted: 08/01/2023] [Indexed: 08/17/2023]
Abstract
The sensation of thirstiness is the desire to drink water. In certain situations, the ingestion of liquid water can be restricted. As a result, thirstiness is not relieved, resulting in an uncomfortable and distressing situation. The present review describes thirstiness and hydration, the food products and beverages that cause thirstiness, and the beverages and food products currently available to quench thirstiness in individuals with restricted access to liquid ingestion. It also discusses how to measure the effectiveness of calming thirstiness. To diminish thirstiness distress, different alternatives to liquids are proposed. Individuals with swallowing disorders are given thickened water, individuals with restricted water ingestion are given ice cubes or ice popsicles of different flavors, and sportspeople are given energy gels. However, current beverage solutions seem not to relieve thirst fully, although some stimuli like iced water, flavors (especially lemon and mint), or acids seem to work better than plain stimuli and could be added to existing products. Therefore, there is still a need to incorporate these strategies into beverage and food formulations and to test their effectiveness.
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Affiliation(s)
- Ruth Picó-Munyoz
- Consumer Perception and Behavior and Adapted Nutrition Laboratory, Institute of Agrochemistry and Food Technology (IATA, CSIC), Paterna, Spain
| | - Amparo Tárrega
- Consumer Perception and Behavior and Adapted Nutrition Laboratory, Institute of Agrochemistry and Food Technology (IATA, CSIC), Paterna, Spain
| | - Laura Laguna
- Consumer Perception and Behavior and Adapted Nutrition Laboratory, Institute of Agrochemistry and Food Technology (IATA, CSIC), Paterna, Spain
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Saunders B, da Costa LR, de Souza RAS, Barreto G, Marticorena FM. Caffeine and sport. ADVANCES IN FOOD AND NUTRITION RESEARCH 2023; 106:95-127. [PMID: 37722778 DOI: 10.1016/bs.afnr.2023.03.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/20/2023]
Abstract
Caffeine is a trimethylxanthine found in coffee and several other foods and beverages. Its stimulatory effects make it an interesting strategy to boost performance for athletic populations. Scientific evidence supports its efficacy to improve high-intensity endurance exercise, explosive and high-intensity efforts, resistance exercise, team sports and combat sports, though individual variation in the ergogenic response to caffeine exists. Supplementation can be taken in many forms including dissolved in water, via capsules, coffee, energy drinks and caffeinated gum; ingestion via capsules, dissolved in water or in caffeinated gum appear to be most effective. Variability in the exercise response following caffeine supplementation may be explained by genetic factors or habitual caffeine consumption. Caffeine is an excellent supplement for athletes looking to improve their exercise performance, though some consideration of side-effects and impact on sleep are warranted.
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Affiliation(s)
- Bryan Saunders
- Applied Physiology and Nutrition Research Group, School of Physical Education and Sport, Rheumatology Division, Faculty of Medicine FMUSP, University of São Paulo, São Paulo, SP, Brazil; Institute of Orthopedics and Traumatology, Faculty of Medicine FMUSP, University of São Paulo, São Paulo, SP, Brazil.
| | - Larissa Registro da Costa
- Applied Physiology and Nutrition Research Group, School of Physical Education and Sport, Rheumatology Division, Faculty of Medicine FMUSP, University of São Paulo, São Paulo, SP, Brazil
| | - Ricardo Augusto Silva de Souza
- Applied Physiology and Nutrition Research Group, School of Physical Education and Sport, Rheumatology Division, Faculty of Medicine FMUSP, University of São Paulo, São Paulo, SP, Brazil
| | - Gabriel Barreto
- Applied Physiology and Nutrition Research Group, School of Physical Education and Sport, Rheumatology Division, Faculty of Medicine FMUSP, University of São Paulo, São Paulo, SP, Brazil
| | - Felipe Miguel Marticorena
- Applied Physiology and Nutrition Research Group, School of Physical Education and Sport, Rheumatology Division, Faculty of Medicine FMUSP, University of São Paulo, São Paulo, SP, Brazil
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Use of Caffeine-Containing Energy Drinks by Japanese Middle School Students: A Cross-Sectional Study of Related Factors. Nutrients 2023; 15:nu15051275. [PMID: 36904274 PMCID: PMC10004827 DOI: 10.3390/nu15051275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 03/01/2023] [Accepted: 03/02/2023] [Indexed: 03/08/2023] Open
Abstract
Excessive consumption of caffeine negatively affects individuals' health. Therefore, we studied the use of energy drinks and the conditions associated with it among Japanese secondary school students. Participants were 236 students in grades 7-9 who completed anonymous questionnaires at home in July 2018. We measured the basic attributes and dietary, sleeping, and exercise habits. We used Chi-squared tests to compare differences between users and non-users of energy drinks. Logistic regression analyses were used to elucidate the complex association between the variables. The results showed that boys were more willing to consume energy drinks than girls. The reasons were 'feeling fatigued', 'needing to stay awake', 'for curiosity', and 'to quench one's thirst'. Among boys, the following were associated with the use of EDs. Buying their own snacks , not understanding nutritional labels on foods, high caffeinated beverage intake, late bed-times on weekdays, always waking up at about the same time, and weight. Health guidance is needed to prevent overconsumption and dependence on energy drinks. The cooperation of parents and teachers is needed to achieve these goals.
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Magno MS, Utheim TP, Morthen MK, Snieder H, Jansonius NM, Hammond CJ, Vehof J. The Relationship Between Caffeine Intake and Dry Eye Disease. Cornea 2023; 42:186-193. [PMID: 35081066 PMCID: PMC9797200 DOI: 10.1097/ico.0000000000002979] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 11/29/2021] [Accepted: 11/29/2021] [Indexed: 01/07/2023]
Abstract
PURPOSE The aim of this study was to determine the association between caffeine intake and dry eye disease (DED) in the large, population-based LifeLines cohort in the Netherlands. METHODS DED was cross-sectionally assessed in 85,302 participants (59% female participants) using the Women's Health Study dry eye questionnaire. Dietary caffeine was calculated from the intake of coffee, tea, cola, and energy drinks. Logistic regression was used to investigate the relationship between DED and caffeine, correcting for demographic variables, smoking status, alcohol intake, and 48 comorbidities of DED. RESULTS The mean (SD; range) age of participants was 50.7 years (12.4; 18-96), and 50,339 (59%) were female. The mean (SD) caffeine intake was 285 (182) mg/d. After correcting for demographics, body mass index, smoking status, and alcohol intake, higher caffeine intake was associated with a decreased risk of Women's Health Study-defined DED [odds ratio (OR) 0.971 per 100 mg/d, 95% CI, 0.956-0.986, P < 0.0005]. When additionally adjusting for medical comorbidities, no significant effect was observed (OR 0.985, 95% CI, 0.969-1.001, P = 0.06). Caffeine's effect on DED was similar in male and female participants and independent of sleep quality and stress at work. Decaffeinated coffee intake was significantly associated with an increased risk of DED, when adjusted for caffeinated coffee, demographics, alcohol intake, smoking status, and comorbidities (OR 1.046 per cup/d, 95% CI, 1.010-1.084, P = 0.01). None of the beverages were significantly associated with the risk of DED, when correcting for intake of the other caffeinated beverages, demographics, smoking status, alcohol intake, and all comorbidities. CONCLUSIONS Dietary caffeine intake does not seem to be a risk factor for DED in the general population.
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Affiliation(s)
- Morten Schjerven Magno
- Departments of Medical Biochemistry; and
- Plastic and Reconstructive Surgery, Oslo University Hospital, Oslo, Norway
- Department of Ophthalmology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - Tor P. Utheim
- Departments of Medical Biochemistry; and
- Department of Ophthalmology, Oslo University Hospital, Oslo, Norway;
| | - Mathias Kaurstad Morthen
- Departments of Medical Biochemistry; and
- Department of Ophthalmology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - Harold Snieder
- Department of Epidemiology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands;
| | - Nomdo M. Jansonius
- Department of Ophthalmology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - Christopher J. Hammond
- Department of Twin Research & Genetic Epidemiology, King's College London, St Thomas' Hospital, London, United Kingdom;
- Department of Ophthalmology, King's College London, St Thomas' Hospital, London, United Kingdom
| | - Jelle Vehof
- Dutch Dry Eye Clinic, Velp, the Netherlands;
- Department of Ophthalmology, Vestfold Hospital Trust, Tønsberg, Norway; and
- Departments of Ophthalmology and Epidemiology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands.
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Kehrenberg MCA, Bachmann HS. Diuretics: a contemporary pharmacological classification? NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2022; 395:619-627. [PMID: 35294605 PMCID: PMC9072265 DOI: 10.1007/s00210-022-02228-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Accepted: 03/07/2022] [Indexed: 12/22/2022]
Abstract
Diuretics are drugs that increase the flow of urine. They are commonly used to treat edema, hypertension, and heart failure. Typically, the pharmacological group consists of five classes: thiazide diuretics, loop diuretics, potassium-sparing diuretics, osmotic diuretics, and carbonic anhydrase inhibitors. This traditional classification and the nomenclature of diuretics have not changed over the last decades, which means that it was not adapted to current pharmacological research. Modern approaches in the field of pharmacological nomenclature suggest the introduction of mechanism-based drug class designations, which is not yet reflected in the group of diuretics. Moreover, included drug classes have lost their relevance as diuretic agents. Carbonic anhydrase inhibitors, for example, are mainly used in the treatment of glaucoma. Newer agents such as vasopressin-2 receptor antagonists or SGLT2 inhibitors possess diuretic properties but are not included in the pharmacological group. This review discusses the currentness of the pharmacological classification of diuretics. We elaborate changes in the field of nomenclature, the contemporary medical use of classical diuretics, and new diuretic agents.
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Affiliation(s)
- Miriam C A Kehrenberg
- Institute of Pharmacology and Toxicology, Centre for Biomedical Education and Research, Witten/Herdecke University, Witten, Germany
| | - Hagen S Bachmann
- Institute of Pharmacology and Toxicology, Centre for Biomedical Education and Research, Witten/Herdecke University, Witten, Germany.
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Marzuki I, Nasution R, Bahi M, Marianne M. Isolation of Caffeine from Scurrula ferruginea Jack Danser (Coffee Parasite) as a Sunscreen in Lotion Formula. Open Access Maced J Med Sci 2022. [DOI: 10.3889/oamjms.2022.8195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
This research aims to determine the sunscreen activity of the extract, extract lotion, subfraction, and pure compound of Scurrula ferruginea Jack Danser and to determine the physical properties of the extract lotion. S. ferruginea was extracted by the maceration method using ethanol solvent. The sunscreen activity was evaluated using the spectrophotometric method and calculated by the Sun Protection Factor (SPF). The results of elucidation structure by using GC-MS and FTIR, the pure compound was suspected as a caffeine compound. This caffeine has a good sunscreen activity with an SPF value of 21.358 ± 0.011. The results of the SPF value of the extract, extract lotion, subfractions (A-E), and subfractions (A-E) lotion was range of 32.270 ± 0.227 to 38.171 ± 0.440; 21.358 ± 0.098 to 34.665 ± 0.315; 27.383 ± 0.407 to 34.719 ± 0.162 and 23.448 ± 0.147 to 32.039 ± 0.171 at concentrations of 2%, 2.5%, 5%, 7.5%, and 12%, respectively. The SPF value of the extract, extract lotion, subfraction, and pure compound are included in the ultra category. The results of physical properties of the extract lotion meet the standards set by Standard Nasional Indonesia (SNI) 1996.
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Miller JD, Workman CL, Panchang SV, Sneegas G, Adams EA, Young SL, Thompson AL. Water Security and Nutrition: Current Knowledge and Research Opportunities. Adv Nutr 2021; 12:2525-2539. [PMID: 34265039 PMCID: PMC8634318 DOI: 10.1093/advances/nmab075] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 04/22/2021] [Accepted: 05/24/2021] [Indexed: 12/14/2022] Open
Abstract
Water is an essential nutrient that has primarily been considered in terms of its physiological necessity. But reliable access to water in sufficient quantities and quality is also critical for many nutrition-related behaviors and activities, including growing and cooking diverse foods. Given growing challenges to water availability and safety, including climate change, pollution, and infrastructure degradation, a broader conceptualization of water and its diverse uses is needed to sustainably achieve global nutrition targets. Therefore, we review empirical and qualitative evidence describing the linkages between water security (the reliable availability, accessibility, and quality of water for all household uses) and nutrition. Primary linkages include water security for drinking, food production and preparation, infant and young child feeding, and limiting exposure to pathogens and environmental toxins. We then identify knowledge gaps within each linkage and propose a research agenda for studying water security and nutrition going forward, including the concurrent quantification of both food and water availability, accessibility, use, and stability. By making explicit the connections between water security and nutritional well-being, we aim to promote greater collaboration between the nutrition and water, sanitation, and hygiene sectors. Interdisciplinary policies and programs that holistically address the water-nutrition nexus, versus those that focus on water and nutrition independently, are likely to significantly advance our ability to ensure equitable access to healthy foods and safe water for all.
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Affiliation(s)
- Joshua D Miller
- Department of Nutrition, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Cassandra L Workman
- Department of Anthropology, University of North Carolina at Greensboro, Greensboro, NC, USA
| | - Sarita V Panchang
- Social Research and Evaluation Center, Louisiana State University, Baton Rouge, LA, USA
| | - Gretchen Sneegas
- Department of Geography, Texas A&M University, College Station, TX, USA
| | - Ellis A Adams
- Keough School of Global Affairs, University of Notre Dame, Notre Dame, IN, USA
| | - Sera L Young
- Department of Anthropology, Northwestern University, Evanston, IL, USA
- Institute for Policy Research, Northwestern University, Evanston, IL, USA
| | - Amanda L Thompson
- Department of Nutrition, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Carolina Population Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Department of Anthropology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
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11
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Morde A, Sudhakar K, Rambabu M, Shankar A, Rai D, Pawar K, Acharya M, Bakan M, Nalawade P, Nayakwadi R, Padigaru M. Pharmacokinetic profile of a novel sustained-release caffeine with extended benefits on alertness and mood: A randomized, double-blind, single-dose, active-controlled, crossover study. CURRENT RESEARCH IN BEHAVIORAL SCIENCES 2021. [DOI: 10.1016/j.crbeha.2021.100036] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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12
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Brzezicha J, Błażejewicz D, Brzezińska J, Grembecka M. Green coffee VS dietary supplements: A comparative analysis of bioactive compounds and antioxidant activity. Food Chem Toxicol 2021; 155:112377. [PMID: 34197879 DOI: 10.1016/j.fct.2021.112377] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 06/07/2021] [Accepted: 06/26/2021] [Indexed: 11/30/2022]
Abstract
The aim of this work was to assess and compare both the antioxidant potential and content of the selected biologically active substances in green coffee samples and dietary supplements based on green coffee extracts. The newly developed method using HPLC coupled with Corona detector (HPLC-CAD) allowed the analysis of chlorogenic acid, caffeine, caffeic acid, coumaric acid, and ferulic acid in a single run. The method was validated and characterized by a wide concentration range (5-75 μg/mL), sensitivity, accuracy (92.7-112%), repeatability (RSD <5.32%), and precision (1.80-4.04%). The assessment of antioxidant potential was done by the spectrophotometric Folin-Ciocalteu method. Green coffee samples and extract characterized by comparable or, in the case of some samples, even higher antioxidant properties than dietary supplements. There was found a great variety of CGA levels in dietary supplements (0.33-329 mg/g) compared to the green coffee samples (32.7 mg/g - 47.6 mg/g). The highest caffeine content (156 mg/tablet) was determined in one dietary supplement, while green coffee samples contained its lower levels (20.9 mg/g). The quality of some supplements is not satisfactory as their composition does not comply with the manufacturer's declaration. There were found discrepancies between the value determined and declared by the producer (<243%).
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Affiliation(s)
- Justyna Brzezicha
- Department of Bromatology, Medical University of Gdansk, Al. Gen. J. Hallera 107, 80-416, Gdansk, Poland.
| | - Daria Błażejewicz
- Department of Bromatology, Medical University of Gdansk, Al. Gen. J. Hallera 107, 80-416, Gdansk, Poland.
| | - Joanna Brzezińska
- Department of Bromatology, Medical University of Gdansk, Al. Gen. J. Hallera 107, 80-416, Gdansk, Poland.
| | - Małgorzata Grembecka
- Department of Bromatology, Medical University of Gdansk, Al. Gen. J. Hallera 107, 80-416, Gdansk, Poland.
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Escalante G, Stevenson SW, Barakat C, Aragon AA, Schoenfeld BJ. Peak week recommendations for bodybuilders: an evidence based approach. BMC Sports Sci Med Rehabil 2021; 13:68. [PMID: 34120635 PMCID: PMC8201693 DOI: 10.1186/s13102-021-00296-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Accepted: 06/02/2021] [Indexed: 01/10/2023]
Abstract
Bodybuilding is a competitive endeavor where a combination of muscle size, symmetry, "conditioning" (low body fat levels), and stage presentation are judged. Success in bodybuilding requires that competitors achieve their peak physique during the day of competition. To this end, competitors have been reported to employ various peaking interventions during the final days leading to competition. Commonly reported peaking strategies include altering exercise and nutritional regimens, including manipulation of macronutrient, water, and electrolyte intake, as well as consumption of various dietary supplements. The primary goals for these interventions are to maximize muscle glycogen content, minimize subcutaneous water, and reduce the risk abdominal bloating to bring about a more aesthetically pleasing physique. Unfortunately, there is a dearth of evidence to support the commonly reported practices employed by bodybuilders during peak week. Hence, the purpose of this article is to critically review the current literature as to the scientific support for pre-contest peaking protocols most commonly employed by bodybuilders and provide evidence-based recommendations as safe and effective strategies on the topic.
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Affiliation(s)
- Guillermo Escalante
- Department of Kinesiology, California State University- San Bernardino, CA San Bernardino, USA
| | | | - Christopher Barakat
- Competitive Breed LLC, FL Tampa, USA
- Human Performance Laboratory, The University of Tampa, FL Tampa, USA
| | - Alan A. Aragon
- Department of Family and Consumer Sciences, California State University- Northridge, Los Angeles, CA USA
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14
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Coffee Brews: Are They a Source of Macroelements in Human Nutrition? Foods 2021; 10:foods10061328. [PMID: 34207680 PMCID: PMC8227654 DOI: 10.3390/foods10061328] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2021] [Revised: 06/03/2021] [Accepted: 06/07/2021] [Indexed: 12/13/2022] Open
Abstract
Coffee brews, made by pouring water on coffee grounds or brewing in an espresso machine, are among the most popular beverages. The aim of this study was to summarize data on the content of macroelements (sodium, potassium, calcium, magnesium, and phosphorus) in coffee brews prepared with different methods, as well as to review the factors influencing the content of the elements. Studies from 2000 to 2020, published in the PubMed and Google Scholar databases, were reviewed. Taking into account the results presented by the authors, we calculated that one portion of coffee brew can cover 7.5% or 6.4% (for women and men) and 6.6% of the daily requirement for magnesium and potassium, respectively. Coffee provides slightly lower amounts of phosphorus (up to 2.2%), sodium (up to 2.2%), and calcium (up to 0.7% of the daily requirement for women and 0.6% for men). If coffee is drunk in the quantity of three to four cups, it can be an important source of magnesium, considering the risk of magnesium deficiency in modern societies.
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Mota JF, Gonzalez MC, Lukaski H, Oto GL, Trottier CF, Tibaes JRB, Prado CM. The influence of coffee consumption on bioelectrical impedance parameters: a randomized, double-blind, cross-over trial. Eur J Clin Nutr 2021; 76:212-219. [PMID: 33986493 DOI: 10.1038/s41430-021-00932-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 04/01/2021] [Accepted: 04/20/2021] [Indexed: 11/09/2022]
Abstract
BACKGROUND Bioelectrical impedance analysis (BIA) is a widely used method for estimating body composition. Avoiding foods/beverages containing caffeine is a frequently enforced pre-test protocol to ensure reliability of BIA measurements. However, few studies have evaluated whether this is necessary, with conflicting results. We aimed to determine whether the coffee consumption differing in caffeine content influences BIA parameters in healthy adults. METHODS Twenty-five healthy adults were enrolled in a randomized, double-blind cross-over trial. Three amounts of caffeine were given with 200 mL of coffee: 0 mg (11 g of decaffeinated), 200 mg (5.5 g of caffeinated plus 5.5 g of decaffeinated), and 400 mg of caffeine (11 g of caffeinated). BIA measurements were conducted at 6 different times, and coefficient variations (CV) explored. RESULTS No differences were observed for group × time interaction on impedance, resistance, or reactance (p > 0.05). Values of BIA parameters increased after 30-min of coffee consumption, independently of the caffeine dosage (all p < 0.001). Body fat percentage followed the same pattern and increased after 45-min (p < 0.05). Median CV for consecutive impedance, resistance, and reactance measurements were >95%CI of expected device measurement error over 70-min, without difference between groups. Urine output volume was not different between groups (decaffeinated: 440.45 ± 197.57 mL; 200 mg: 471.80 ± 171.88 mL; 400 mg: 489.30 ± 204.10 mL, p > 0.05). CONCLUSION Coffee consumption influenced BIA-derived results after 70-min but was not related to caffeine content, likely due to water intake.
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Affiliation(s)
- João F Mota
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Li Ka Shing Centre for Health Research Innovation, Edmonton, AB, T6G 2E1, Canada. .,Clinical and Sports Nutrition Research Laboratory (LABINCE), Faculty of Nutrition, Federal University of Goiás, Goiânia, GO, 74.605-080, Brazil.
| | - Maria Cristina Gonzalez
- Postgraduate Program in Health and Behavior, Catholic University of Pelotas, Pelotas, RS, 96055-800, Brazil
| | - Henry Lukaski
- Department of Kinesiology and Public Health Education, University of North Dakota, Grand Forks, ND, 58202, USA
| | - Gabriela L Oto
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Li Ka Shing Centre for Health Research Innovation, Edmonton, AB, T6G 2E1, Canada
| | - Claire F Trottier
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Li Ka Shing Centre for Health Research Innovation, Edmonton, AB, T6G 2E1, Canada
| | - Jenneffer R B Tibaes
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Li Ka Shing Centre for Health Research Innovation, Edmonton, AB, T6G 2E1, Canada.,Department of Food Science, Faculty of Pharmacy, Federal University of Minas Gerais, Rua Professor Moacir Gomes de Freitas - Pampulha, Belo Horizonte, MG, 31270-901, Brazil
| | - Carla M Prado
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Li Ka Shing Centre for Health Research Innovation, Edmonton, AB, T6G 2E1, Canada.
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Frigerio S, Strawbridge R, Young AH. The impact of caffeine consumption on clinical symptoms in patients with bipolar disorder: A systematic review. Bipolar Disord 2021; 23:241-251. [PMID: 32949106 DOI: 10.1111/bdi.12990] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVES In healthy populations, caffeine appears to have beneficial effects on health; however, patients with bipolar disorder (BD) are routinely advised to limit caffeine use in psychoeducation programmes. We aimed to examine all literature reporting whether caffeine intake/withdrawal impacts the natural course of BD, in terms of clinical outcomes. METHODS PubMed, Embase and PsycINFO were searched (up to 17/07/2020) and all studies reporting data on individuals with BD comparing a measure of caffeine use with illness severity (symptoms of mania, depression, psychosis, anxiety, sleep or suicidality) were included. RESULTS Of the 1678 records reviewed, 17 studies met inclusion criteria (10 case reports, 1 retrospective cohort study, 5 cross-sectional studies, 1 interventional study). Most case reports described people with BD switching to manic, hypomanic or mixed states after consuming caffeine in variable amounts and/or whose serum lithium concentrations increased after reducing caffeine consumption. The interventional study found that caffeine may suppress lithium concentrations, while the retrospective cohort study reported that participants who drank coffee had more suicidality than non-drinkers. CONCLUSIONS The literature examining clinical effects of caffeine in patients with BD is not conclusive. Acute increases in caffeine consumption may precede the occurrence of manic symptoms in patients with BD, potentially through a direct stimulant effect, affecting sleep patterns and/or the metabolism of lithium or other medications, although increases in caffeine intake could also be a consequence of an ongoing manic relapse or a prodromal sign. Further research is needed to determine whether caffeine use impacts the long-term prognosis of BD.
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Affiliation(s)
- Sofia Frigerio
- Department of Psychological Medicine, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK.,Dipartimento di Scienze del Sistema Nervoso e del Comportamento, Università degli Studi di Pavia, Pavia, Italy
| | - Rebecca Strawbridge
- Department of Psychological Medicine, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - Allan H Young
- Department of Psychological Medicine, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
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17
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Georgalas VL, Kalantzi N, Harpur I, Kenny C. The Effects of Caffeine on Voice: A Systematic Review. J Voice 2021:S0892-1997(21)00084-9. [PMID: 33752928 DOI: 10.1016/j.jvoice.2021.02.025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 02/11/2021] [Accepted: 02/15/2021] [Indexed: 10/21/2022]
Abstract
BACKGROUND Caffeine is considered a dehydrating agent due to its diuretic effects and influences the body's fluid balance. The relationship between voice and hydration has been widely investigated and it is accepted that inadequate hydration has detrimental effects on phonation. Since dehydration negatively affects the vocal folds and caffeine is considered a dehydrating agent, it can be hypothesized that voice might be negatively affected by caffeine intake. This systematic review aims to summarize and appraise the available evidence regarding the effects of caffeine on voice. METHODS Randomized and non-randomized experimental studies of healthy participants were retrieved following an electronic searching of six databases in June 2020. No publication, language or date restrictions were applied. Data extraction of relevant data and risk of bias assessment was conducted independently by two reviewers. RESULTS Five non-randomized experimental studies were deemed eligible for inclusion. The format of the administered interventions in the included studies was either liquid (coffee) or solid (caffeine tablets). Reported outcome measures used to examine the effects of caffeine on phonation consisted of acoustic, aerodynamic and (auditory & self-) perceptual. No measures were adversely affected by caffeine consumption. CONCLUSION Clinicians commonly advise patients to refrain from caffeine, as caffeine intake increases diuresis with subsequent effects on fluid balance. Such imbalances can potentially induce dehydration which can be detrimental to phonation. This notion cannot be supported empirically, as the evidence is deemed unreliable and no firm conclusions can be elicited to guide clinical practice. The results of this review demonstrate the lack of research in the field and the necessity for future investigations in order to inform evidence-based practice through reliable and valid outcomes.
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Affiliation(s)
- Vasilis L Georgalas
- Department of Clinical Speech and Language studies, Trinity College Dublin, Dublin, Ireland.
| | - Niki Kalantzi
- Department of Clinical Speech and Language studies, Trinity College Dublin, Dublin, Ireland
| | | | - Ciarán Kenny
- Department of Clinical Speech and Language studies, Trinity College Dublin, Dublin, Ireland
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18
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Acute effect of green tea catechins on uric acid metabolism after alcohol ingestion in Japanese men. Clin Rheumatol 2021; 40:2881-2888. [PMID: 33569708 DOI: 10.1007/s10067-021-05625-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 01/27/2021] [Accepted: 01/31/2021] [Indexed: 10/22/2022]
Abstract
INTRODUCTION/OBJECTIVES Alcohol consumption is associated with hyperuricemia and gout. Previous studies have indicated a role for green tea catechins in uric acid (UA) metabolism. This study aimed to elucidate the acute effect of green tea catechins in terms of enhancing urinary excretion of UA and xanthine/hypoxanthine (Xa/HX; UA precursors) after alcohol ingestion. METHODS In a randomized crossover study, ten healthy Japanese subjects consumed test meals, including a Japanese distilled spirit (Shōchū) with water (SW) or Shōchū with catechin-rich green tea (SC), each containing 20 g of alcohol. The SC contained 617 mg of catechin in total. Serum and urine UA and Xa/HX concentrations were measured. Blood samples were collected after 2.5 h, and urine samples were collected between 0 and 5 h after consuming the test meal. RESULTS Urine UA and Xa/HX excretions were significantly higher in the SC group than in the SW group (UA: SW, 0.45 ± 0.08; SC, 0.52 ± 0.09; Xa/HX: SW, 0.08 ± 0.04; SC, 0.16 ± 0.05 mg/kg/h). UA clearance (CUA) and fractional UA excretion (FEUA) tended to increase more in the SC group than in the SW group (CUA: SW, 7.76 ± 2.14; SC, 8.75 ± 2.23 mL/min/1.73 m2; FEUA: SW, 6.08 ± 1.36; SC, 6.64 ± 1.42%). No significant differences in serum UA and Xa/HX concentrations were observed between two groups. CONCLUSIONS It was concluded that green tea catechins can enhance the excretion of UA and Xa/HX, even though alcohol is ingested. TRIAL REGISTRATION NUMBER UMIN000040076. Retrospectively registered 7 April 2020. https://upload.umin.ac.jp/cgi-open-bin/ctr/ctr_view.cgi?recptno=R000045687 Key Points • Green tea catechins enhance the excretion of uric acid and xanthine/hypoxanthine, even when alcohol is ingested simultaneously. • In case of non-adherence of limiting alcohol intake, catechin-rich green tea may be an effective dietary component to continue dietary therapy.
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19
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Guest NS, VanDusseldorp TA, Nelson MT, Grgic J, Schoenfeld BJ, Jenkins NDM, Arent SM, Antonio J, Stout JR, Trexler ET, Smith-Ryan AE, Goldstein ER, Kalman DS, Campbell BI. International society of sports nutrition position stand: caffeine and exercise performance. J Int Soc Sports Nutr 2021; 18:1. [PMID: 33388079 PMCID: PMC7777221 DOI: 10.1186/s12970-020-00383-4] [Citation(s) in RCA: 193] [Impact Index Per Article: 64.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Accepted: 10/31/2020] [Indexed: 12/13/2022] Open
Abstract
Following critical evaluation of the available literature to date, The International Society of Sports Nutrition (ISSN) position regarding caffeine intake is as follows: 1. Supplementation with caffeine has been shown to acutely enhance various aspects of exercise performance in many but not all studies. Small to moderate benefits of caffeine use include, but are not limited to: muscular endurance, movement velocity and muscular strength, sprinting, jumping, and throwing performance, as well as a wide range of aerobic and anaerobic sport-specific actions. 2. Aerobic endurance appears to be the form of exercise with the most consistent moderate-to-large benefits from caffeine use, although the magnitude of its effects differs between individuals. 3. Caffeine has consistently been shown to improve exercise performance when consumed in doses of 3-6 mg/kg body mass. Minimal effective doses of caffeine currently remain unclear but they may be as low as 2 mg/kg body mass. Very high doses of caffeine (e.g. 9 mg/kg) are associated with a high incidence of side-effects and do not seem to be required to elicit an ergogenic effect. 4. The most commonly used timing of caffeine supplementation is 60 min pre-exercise. Optimal timing of caffeine ingestion likely depends on the source of caffeine. For example, as compared to caffeine capsules, caffeine chewing gums may require a shorter waiting time from consumption to the start of the exercise session. 5. Caffeine appears to improve physical performance in both trained and untrained individuals. 6. Inter-individual differences in sport and exercise performance as well as adverse effects on sleep or feelings of anxiety following caffeine ingestion may be attributed to genetic variation associated with caffeine metabolism, and physical and psychological response. Other factors such as habitual caffeine intake also may play a role in between-individual response variation. 7. Caffeine has been shown to be ergogenic for cognitive function, including attention and vigilance, in most individuals. 8. Caffeine may improve cognitive and physical performance in some individuals under conditions of sleep deprivation. 9. The use of caffeine in conjunction with endurance exercise in the heat and at altitude is well supported when dosages range from 3 to 6 mg/kg and 4-6 mg/kg, respectively. 10. Alternative sources of caffeine such as caffeinated chewing gum, mouth rinses, energy gels and chews have been shown to improve performance, primarily in aerobic exercise. 11. Energy drinks and pre-workout supplements containing caffeine have been demonstrated to enhance both anaerobic and aerobic performance.
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Affiliation(s)
- Nanci S Guest
- Department of Nutritional Sciences, Faculty of Medicine, University of Toronto, 1 King's College Circle, Room 5326A, Toronto, ON, M5S 1A8, Canada.
| | - Trisha A VanDusseldorp
- Department of Exercise Science and Sport Management, Kennesaw State University, Kennesaw, GA, 30144, USA
| | | | - Jozo Grgic
- Institute for Health and Sport (IHES), Victoria University, Melbourne, Australia
| | - Brad J Schoenfeld
- Department of Health Sciences, CUNY Lehman College, Bronx, NY, 10468, USA
| | - Nathaniel D M Jenkins
- Department of Health and Human Physiology, University of Iowa, Iowa City, IA, 52240, USA
| | - Shawn M Arent
- Department of Exercise Science, Arnold School of Public Health, University of South Carolina, Colombia, SC, 29208, USA
- School of Social and Health Sciences, Leeds Trinity University, Leeds, UK
| | - Jose Antonio
- Exercise and Sport Science, Nova Southeastern University, Davie, FL, 33314, USA
| | - Jeffrey R Stout
- Institue of Exercise Physiology and Rehabilitation Science, University of Central Florida, Orlando, FL, 32816, USA
| | | | - Abbie E Smith-Ryan
- Department of Exercise and Sport Science, Applied Physiology Laboratory, University of North Carolina, Chapel Hill, NC, 27599, USA
| | - Erica R Goldstein
- Institue of Exercise Physiology and Rehabilitation Science, University of Central Florida, Orlando, FL, 32816, USA
| | - Douglas S Kalman
- Nutrion Department, College of Osteopathic Medicine, Nova Southeastern University, Fort Lauderdale, FL, 33314, USA
- Scientific Affairs. Nutrasource, Guelph, ON, Canada
| | - Bill I Campbell
- Performance & Physique Enhancement Laboratory, University of South Florida, Tampa, FL, 33612, USA
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20
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Tea and coffee consumption and pathophysiology related to kidney stone formation: a systematic review. World J Urol 2020; 39:2417-2426. [PMID: 33052484 DOI: 10.1007/s00345-020-03466-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Accepted: 09/21/2020] [Indexed: 10/23/2022] Open
Abstract
OBJECTIVE To explore the mechanisms behind the potential protective effect of coffee and tea consumption, regarding urinary stone formation, previously demonstrated in large epidemiological studies. METHODS A systematic review was performed using the Medline, Cochrane library (CENTRAL) and Scopus databases, in concordance with the PRISMA statement. English, French and Spanish language studies, regarding the consumption of caffeinated and decaffeinated coffee and tea, and the relationship to urinary stone formation were reviewed. Meta-analyses, systematic reviews, case reports and letters, unpublished studies, posters and comments abstracts were excluded. RESULTS As per the inclusion criteria, 13 studies were included in the final review. The major findings show that caffeine increases urinary excretion of calcium, sodium and magnesium, in addition to a diuretic action with consumption > 300-360 mg (approximately four cups of coffee). Together with other components of coffee, this beverage might have potential protective effects against the formation of urinary stones. Tea exerts many protective effects against stone formation, through the accompanying water intake, the action of caffeine and the effects of components with antioxidant properties. CONCLUSION Caffeine has a hypercalciuric effect, balanced partially by a diuretic effect which appears after consumption of large quantities of caffeine. The current available literature supports in general, a potentially protective role for tea against stone formation, mainly for green tea. Additional standardization in this field of research, through specification of tea and coffee types studied, and their respective compositions, is needed for further clarification of the relation between coffee, tea and urinary stones.
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21
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Yu EYW, Dai Y, Wesselius A, van Osch F, Brinkman M, van den Brandt P, Grant EJ, White E, Weiderpass E, Gunter M, Hemon B, Zeegers MP. Coffee consumption and risk of bladder cancer: a pooled analysis of 501,604 participants from 12 cohort studies in the BLadder Cancer Epidemiology and Nutritional Determinants (BLEND) international study. Eur J Epidemiol 2020; 35:523-535. [PMID: 31927701 DOI: 10.1007/s10654-019-00597-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Accepted: 12/12/2019] [Indexed: 02/06/2023]
Abstract
Recent epidemiological studies have shown varying associations between coffee consumption and bladder cancer (BC). This research aims to elucidate the association between coffee consumption and BC risk by bringing together worldwide cohort studies on this topic. Coffee consumption in relation to BC risk was examined by pooling individual data from 12 cohort studies, comprising of 2601 cases out of 501,604 participants. Pooled multivariate hazard ratios (HRs), with corresponding 95% confidence intervals (CIs), were obtained using multilevel Weibull regression models. Furthermore, dose-response relationships were examined using generalized least squares regression models. The association between coffee consumption and BC risk showed interaction with sex (P-interaction < 0.001) and smoking (P-interaction = 0.001). Therefore, analyses were stratified by sex and smoking. After adjustment for potential confounders, an increased BC risk was shown for high (> 500 ml/day, equivalent to > 4 cups/day) coffee consumption compared to never consumers among male smokers (current smokers: HR = 1.75, 95% CI 1.27-2.42, P-trend = 0.002; former smokers: HR = 1.44, 95% CI 1.12-1.85, P-trend = 0.001). In addition, dose-response analyses, in male smokers also showed an increased BC risk for coffee consumption of more than 500 ml/day (4 cups/day), with the risk of one cup (125 ml) increment as 1.07 (95% CI 1.06-1.08). This research suggests that positive associations between coffee consumption and BC among male smokers but not never smokers and females. The inconsistent results between sexes and the absence of an association in never smokers indicate that the associations found among male smokers is unlikely to be causal and is possibly caused by residual confounding of smoking.
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Affiliation(s)
- Evan Y W Yu
- Department of Complex Genetics and Epidemiology, School of Nutrition and Translational Research in Metabolism, Maastricht University, Universiteitssingel 40 (Room C5.570), 6229 ER, Maastricht, The Netherlands
| | - Yanan Dai
- Department of Complex Genetics and Epidemiology, School of Nutrition and Translational Research in Metabolism, Maastricht University, Universiteitssingel 40 (Room C5.570), 6229 ER, Maastricht, The Netherlands
| | - Anke Wesselius
- Department of Complex Genetics and Epidemiology, School of Nutrition and Translational Research in Metabolism, Maastricht University, Universiteitssingel 40 (Room C5.570), 6229 ER, Maastricht, The Netherlands.
| | - Frits van Osch
- Department of Complex Genetics and Epidemiology, School of Nutrition and Translational Research in Metabolism, Maastricht University, Universiteitssingel 40 (Room C5.570), 6229 ER, Maastricht, The Netherlands
| | - Maree Brinkman
- Department of Complex Genetics and Epidemiology, School of Nutrition and Translational Research in Metabolism, Maastricht University, Universiteitssingel 40 (Room C5.570), 6229 ER, Maastricht, The Netherlands
- Department of Clinical Studies and Nutritional Epidemiology, Nutrition Biomed Research Institute, Melbourne, Australia
- Cancer Epidemiology Division, Cancer Council Victoria, 615 St Kilda Road, Melbourne, VIC, 3004, Australia
| | - Piet van den Brandt
- Department of Epidemiology, Schools for Oncology and Developmental Biology and Public Health and Primary Care, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - Eric J Grant
- Department of Epidemiology, Radiation Effects Research Foundation, Hiroshima, Japan
| | - Emily White
- Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Elisabete Weiderpass
- International Agency for Research on Cancer World Health Organization, Lyon, France
| | - Marc Gunter
- International Agency for Research on Cancer World Health Organization, Lyon, France
| | - Bertrand Hemon
- International Agency for Research on Cancer World Health Organization, Lyon, France
| | - Maurice P Zeegers
- Department of Complex Genetics and Epidemiology, School of Nutrition and Translational Research in Metabolism, Maastricht University, Universiteitssingel 40 (Room C5.570), 6229 ER, Maastricht, The Netherlands
- CAPHRI School for Public Health and Primary Care, Maastricht University, Maastricht, The Netherlands
- School of Cancer Sciences, University of Birmingham, Birmingham, UK
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Muñoz CX, Johnson EC, Kunces LJ, McKenzie AL, Wininger M, Butts CL, Caldwell A, Seal A, McDermott BP, Vingren J, Colburn AT, Wright SS, Lopez III V, Armstrong LE, Lee EC. Impact of Nutrient Intake on Hydration Biomarkers Following Exercise and Rehydration Using a Clustering-Based Approach. Nutrients 2020; 12:nu12051276. [PMID: 32365848 PMCID: PMC7282025 DOI: 10.3390/nu12051276] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 04/21/2020] [Accepted: 04/27/2020] [Indexed: 12/26/2022] Open
Abstract
We investigated the impact of nutrient intake on hydration biomarkers in cyclists before and after a 161 km ride, including one hour after a 650 mL water bolus consumed post-ride. To control for multicollinearity, we chose a clustering-based, machine learning statistical approach. Five hydration biomarkers (urine color, urine specific gravity, plasma osmolality, plasma copeptin, and body mass change) were configured as raw- and percent change. Linear regressions were used to test for associations between hydration markers and eight predictor terms derived from 19 nutrients merged into a reduced-dimensionality dataset through serial k-means clustering. Most predictor groups showed significant association with at least one hydration biomarker: (1) Glycemic Load + Carbohydrates + Sodium, (2) Protein + Fat + Zinc, (3) Magnesium + Calcium, (4) Pinitol, (5) Caffeine, (6) Fiber + Betaine, and (7) Water; potassium + three polyols, and mannitol + sorbitol showed no significant associations with any hydration biomarker. All five hydration biomarkers were associated with at least one nutrient predictor in at least one configuration. We conclude that in a real-life scenario, some nutrients may serve as mediators of body water, and urine-specific hydration biomarkers may be more responsive to nutrient intake than measures derived from plasma or body mass.
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Affiliation(s)
- Colleen X. Muñoz
- Department of Health Sciences, University of Hartford, West Hartford, CT 06117, USA;
- Correspondence:
| | - Evan C. Johnson
- Division of Kinesiology & Health, University of Wyoming, Laramie, WY 82071, USA;
| | | | | | - Michael Wininger
- Department of Health Sciences, University of Hartford, West Hartford, CT 06117, USA;
- Yale School of Public Health, New Haven, CT 06511, USA
- Department of Veterans Affairs, West Haven, CT 06516, USA
| | - Cory L. Butts
- Department of Health Promotion & Human Performance Weber State University, University of Arkansas, Fayetteville, AR 72701, USA; (C.L.B.); (A.C.); (A.S.); (B.P.M.)
| | - Aaron Caldwell
- Department of Health Promotion & Human Performance Weber State University, University of Arkansas, Fayetteville, AR 72701, USA; (C.L.B.); (A.C.); (A.S.); (B.P.M.)
| | - Adam Seal
- Department of Health Promotion & Human Performance Weber State University, University of Arkansas, Fayetteville, AR 72701, USA; (C.L.B.); (A.C.); (A.S.); (B.P.M.)
- California Polytechnic State University, San Luis Obispo, CA 93407, USA
| | - Brendon P. McDermott
- Department of Health Promotion & Human Performance Weber State University, University of Arkansas, Fayetteville, AR 72701, USA; (C.L.B.); (A.C.); (A.S.); (B.P.M.)
| | - Jakob Vingren
- Department of Biological Sciences, University of North Texas, Denton, TX 76203, USA;
| | - Abigail T. Colburn
- Department of Kinesiology, Human Performance Laboratory, University of Connecticut, Storrs, CT 06269, USA; (A.T.C.); (S.S.W.); (L.E.A.); (E.C.L.)
| | - Skylar S. Wright
- Department of Kinesiology, Human Performance Laboratory, University of Connecticut, Storrs, CT 06269, USA; (A.T.C.); (S.S.W.); (L.E.A.); (E.C.L.)
| | - Virgilio Lopez III
- Department of Kinesiology, Human Performance Laboratory, University of Connecticut, Storrs, CT 06269, USA; (A.T.C.); (S.S.W.); (L.E.A.); (E.C.L.)
| | - Lawrence E. Armstrong
- Department of Kinesiology, Human Performance Laboratory, University of Connecticut, Storrs, CT 06269, USA; (A.T.C.); (S.S.W.); (L.E.A.); (E.C.L.)
| | - Elaine C. Lee
- Department of Kinesiology, Human Performance Laboratory, University of Connecticut, Storrs, CT 06269, USA; (A.T.C.); (S.S.W.); (L.E.A.); (E.C.L.)
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Le Berre M, Presse N, Morin M, Larouche M, Campeau L, Hu YX, Reid I, Dumoulin C. What do we really know about the role of caffeine on urinary tract symptoms? A scoping review on caffeine consumption and lower urinary tract symptoms in adults. Neurourol Urodyn 2020; 39:1217-1233. [PMID: 32270903 DOI: 10.1002/nau.24344] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 03/16/2020] [Accepted: 03/17/2020] [Indexed: 01/20/2023]
Abstract
AIMS The purpose of this scoping review was to map out the existing literature on caffeine intake and lower urinary tract symptoms (LUTS) in adults. METHODS In this scoping review, we searched for all studies available until June 2019 in MEDLINE, Embase, CINAHL, Cochrane Central Register, PsycINFO, LILACS, LiSSa, Web of Science, and Joanna Briggs Institute electronic databases, in addition to a hand search of the bibliographies of all relevant articles and a gray literature search. Both intervention studies on the effects of caffeine reduction in adults with LUTS and observational studies on the association between caffeine intake and LUTS-related outcomes in adults were included and assessed for methodological quality by two independent reviewers. RESULTS Fourteen intervention and 12 observational studies were included. Overall, there was a decrease in urgency episodes (level of evidence 2, grade of recommendation B) and nocturnal enuresis episodes (4, C) with caffeine reduction. Observational studies reported an unclear association between caffeine intake and LUTS-related outcomes. Most importantly, this present review highlighted high heterogeneity in the studied populations, caffeine measures, and reported outcomes. There was also unknown or high risk of bias in most identified studies. CONCLUSIONS Caffeine reduction appears to reduce LUTS. Future studies on caffeine reduction interventions should target populations with urgency and urge urinary incontinence, which show the most promising results, and include valid and reliable measures of caffeine intake and LUTS. Finally, future studies should also use reporting guidelines to ensure lower risk of bias.
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Affiliation(s)
- Mélanie Le Berre
- Research Center, Institut universitaire de gériatrie de Montréal, Montreal, Canada.,School of Rehabilitation, Université de Montréal, Montreal, Canada.,School of Rehabilitation, Université de Sherbrooke, Sherbrooke, Canada
| | - Nancy Presse
- Research Center, Institut universitaire de gériatrie de Montréal, Montreal, Canada.,School of Rehabilitation, Université de Sherbrooke, Sherbrooke, Canada.,Centre de recherche sur le vieillissement, CIUSSS-de-l'Estrie-CHUS, Sherbrooke, Canada.,Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Canada
| | - Mélanie Morin
- School of Rehabilitation, Université de Sherbrooke, Sherbrooke, Canada.,Centre de recherche sur le vieillissement, CIUSSS-de-l'Estrie-CHUS, Sherbrooke, Canada.,Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Canada.,School of Rehabilitation, McGill University, Montreal, Canada
| | - Maryse Larouche
- School of Rehabilitation, Université de Sherbrooke, Sherbrooke, Canada.,Research Center, St Mary's Research Centre, Montreal, Canada.,Department of Obstetrics & Gynecology, McGill University, Montreal, Canada
| | - Lysanne Campeau
- School of Rehabilitation, Université de Sherbrooke, Sherbrooke, Canada.,Urology Department, Jewish General Hospital, Montreal, Canada.,Department of Surgery/Urology, McGill University, Montreal, Canada
| | - Yu Xin Hu
- Research Center, Institut universitaire de gériatrie de Montréal, Montreal, Canada.,School of Rehabilitation, Université de Sherbrooke, Sherbrooke, Canada.,School of Rehabilitation, McGill University, Montreal, Canada
| | - Isabelle Reid
- Research Center, Institut universitaire de gériatrie de Montréal, Montreal, Canada.,School of Rehabilitation, Université de Sherbrooke, Sherbrooke, Canada
| | - Chantale Dumoulin
- Research Center, Institut universitaire de gériatrie de Montréal, Montreal, Canada.,School of Rehabilitation, Université de Montréal, Montreal, Canada.,School of Rehabilitation, Université de Sherbrooke, Sherbrooke, Canada
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Schafrank LA, Washabaugh JR, Hoke MK. An examination of breastmilk composition among high altitude Peruvian women. Am J Hum Biol 2020; 32:e23412. [DOI: 10.1002/ajhb.23412] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Revised: 02/09/2020] [Accepted: 02/25/2020] [Indexed: 12/25/2022] Open
Affiliation(s)
- Lauren A. Schafrank
- Department of Anthropology University of Pennsylvania Philadelphia Pennsylvania USA
| | | | - Morgan K. Hoke
- Department of Anthropology University of Pennsylvania Philadelphia Pennsylvania USA
- Population Studies Center University of Pennsylvania Philadelphia Pennsylvania USA
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Leipziger J, Praetorius H. Renal Autocrine and Paracrine Signaling: A Story of Self-protection. Physiol Rev 2020; 100:1229-1289. [PMID: 31999508 DOI: 10.1152/physrev.00014.2019] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Autocrine and paracrine signaling in the kidney adds an extra level of diversity and complexity to renal physiology. The extensive scientific production on the topic precludes easy understanding of the fundamental purpose of the vast number of molecules and systems that influence the renal function. This systematic review provides the broader pen strokes for a collected image of renal paracrine signaling. First, we recapitulate the essence of each paracrine system one by one. Thereafter the single components are merged into an overarching physiological concept. The presented survey shows that despite the diversity in the web of paracrine factors, the collected effect on renal function may not be complicated after all. In essence, paracrine activation provides an intelligent system that perceives minor perturbations and reacts with a coordinated and integrated tissue response that relieves the work load from the renal epithelia and favors diuresis and natriuresis. We suggest that the overall function of paracrine signaling is reno-protection and argue that renal paracrine signaling and self-regulation are two sides of the same coin. Thus local paracrine signaling is an intrinsic function of the kidney, and the overall renal effect of changes in blood pressure, volume load, and systemic hormones will always be tinted by its paracrine status.
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Affiliation(s)
- Jens Leipziger
- Department of Biomedicine, Aarhus University, Aarhus, Denmark; and Aarhus Institute of Advanced Studies (AIAS), Aarhus University, Aarhus, Denmark
| | - Helle Praetorius
- Department of Biomedicine, Aarhus University, Aarhus, Denmark; and Aarhus Institute of Advanced Studies (AIAS), Aarhus University, Aarhus, Denmark
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Being Conscious of Water Intake Positively Associated with Sufficient Non-Alcohol Drink Intake Regardless of Seasons and Reasons in Healthy Japanese; the KOBE Study: A Cross Sectional Study. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2019; 16:ijerph16214151. [PMID: 31661872 PMCID: PMC6862318 DOI: 10.3390/ijerph16214151] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Revised: 10/15/2019] [Accepted: 10/19/2019] [Indexed: 01/08/2023]
Abstract
The present study sought to clarify if being conscious of water intake (CWI) is associated with sufficient non-alcohol drink (NAD) intake. We used data of healthy participants without diabetes, aged 40–74 years, in the Kobe Orthopedic and Biomedical Epidemiologic (KOBE) study. The association between being CWI and NAD intake was evaluated by multivariate linear regression analyses after adjusting for age, sex, surveyed months (seasons), alcohol drinking, health-awareness life habits, socioeconomic factors, serum osmolarity, estimated daily salt intake, and reasons for NAD intake. Among 988 (698 women and 290 men) participants eligible for the present analyses, 644 participants (65.2%) were CWI and 344 participants (34.8%) were not CWI (non-CWI). The most popular reason for being CWI was to avoid heat stroke in summer and to prevent ischemic cerebral stroke in winter. The CWI group took more NAD, especially decaffeinated beverages, than the non-CWI group (1846.7 ± 675.1 mL/day vs. 1478.0 ± 636.3 ml/day, p < 0.001). There was a significant association between being CWI and NAD intake in multivariate linear regression analyses ever after adjusting for the relevant variables (β = 318.1, p < 0.001). These findings demonstrated CWI, regardless of the reasons and the seasons, was associated with high NAD intake in Japanese healthy population.
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Voskoboinik A, Koh Y, Kistler PM. Cardiovascular effects of caffeinated beverages. Trends Cardiovasc Med 2019; 29:345-350. [DOI: 10.1016/j.tcm.2018.09.019] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Revised: 09/24/2018] [Accepted: 09/29/2018] [Indexed: 12/12/2022]
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Antonioli L, Haskó G. Caffeine and Bones: If Less Is Good, More May Not Be Better. J Caffeine Adenosine Res 2019; 9:38-39. [PMID: 31745536 PMCID: PMC6860002 DOI: 10.1089/caff.2019.29011.ah] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Affiliation(s)
- Luca Antonioli
- Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
- Department of Anesthesiology, Columbia University, New York, New York
| | - György Haskó
- Department of Anesthesiology, Columbia University, New York, New York
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Papandreou C, Hernández-Alonso P, Bulló M, Ruiz-Canela M, Yu E, Guasch-Ferré M, Toledo E, Dennis C, Deik A, Clish C, Razquin C, Corella D, Estruch R, Ros E, Fitó M, Arós F, Fiol M, Lapetra J, Ruano C, Liang L, Martínez-González MA, Hu FB, Salas-Salvadó J. Plasma Metabolites Associated with Coffee Consumption: A Metabolomic Approach within the PREDIMED Study. Nutrients 2019; 11:E1032. [PMID: 31072000 PMCID: PMC6566346 DOI: 10.3390/nu11051032] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 05/02/2019] [Accepted: 05/03/2019] [Indexed: 02/07/2023] Open
Abstract
Few studies have examined the association of a wide range of metabolites with total and subtypes of coffee consumption. The aim of this study was to investigate associations of plasma metabolites with total, caffeinated, and decaffeinated coffee consumption. We also assessed the ability of metabolites to discriminate between coffee consumption categories. This is a cross-sectional analysis of 1664 participants from the PREDIMED study. Metabolites were semiquantitatively profiled using a multiplatform approach. Consumption of total coffee, caffeinated coffee and decaffeinated coffee was assessed by using a validated food frequency questionnaire. We assessed associations between 387 metabolite levels with total, caffeinated, or decaffeinated coffee consumption (≥50 mL coffee/day) using elastic net regression analysis. Ten-fold cross-validation analyses were used to estimate the discriminative accuracy of metabolites for total and subtypes of coffee. We identified different sets of metabolites associated with total coffee, caffeinated and decaffeinated coffee consumption. These metabolites consisted of lipid species (e.g., sphingomyelin, phosphatidylethanolamine, and phosphatidylcholine) or were derived from glycolysis (alpha-glycerophosphate) and polyphenol metabolism (hippurate). Other metabolites included caffeine, 5-acetylamino-6-amino-3-methyluracil, cotinine, kynurenic acid, glycocholate, lactate, and allantoin. The area under the curve (AUC) was 0.60 (95% CI 0.56-0.64), 0.78 (95% CI 0.75-0.81) and 0.52 (95% CI 0.49-0.55), in the multimetabolite model, for total, caffeinated, and decaffeinated coffee consumption, respectively. Our comprehensive metabolic analysis did not result in a new, reliable potential set of metabolites for coffee consumption.
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Affiliation(s)
- Christopher Papandreou
- Human Nutrition Unit, Faculty of Medicine and Health Sciences, Institut d'Investigació Sanitària Pere Virgili, Rovira i Virgili University, 43201 Reus, Spain.
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, 28029 Madrid, Spain.
| | - Pablo Hernández-Alonso
- Human Nutrition Unit, Faculty of Medicine and Health Sciences, Institut d'Investigació Sanitària Pere Virgili, Rovira i Virgili University, 43201 Reus, Spain.
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, 28029 Madrid, Spain.
| | - Mònica Bulló
- Human Nutrition Unit, Faculty of Medicine and Health Sciences, Institut d'Investigació Sanitària Pere Virgili, Rovira i Virgili University, 43201 Reus, Spain.
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, 28029 Madrid, Spain.
| | - Miguel Ruiz-Canela
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, 28029 Madrid, Spain.
- University of Navarra, Department of Preventive Medicine and Public Health, IdiSNA, 31009 Pamplona, Spain.
| | - Edward Yu
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA.
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA.
| | - Marta Guasch-Ferré
- Human Nutrition Unit, Faculty of Medicine and Health Sciences, Institut d'Investigació Sanitària Pere Virgili, Rovira i Virgili University, 43201 Reus, Spain.
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, 28029 Madrid, Spain.
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA.
| | - Estefanía Toledo
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, 28029 Madrid, Spain.
- University of Navarra, Department of Preventive Medicine and Public Health, IdiSNA, 31009 Pamplona, Spain.
| | - Courtney Dennis
- Broad Institute of MIT and Harvard University, Cambridge, MA 02142, USA.
| | - Amy Deik
- Broad Institute of MIT and Harvard University, Cambridge, MA 02142, USA.
| | - Clary Clish
- Broad Institute of MIT and Harvard University, Cambridge, MA 02142, USA.
| | - Cristina Razquin
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, 28029 Madrid, Spain.
- University of Navarra, Department of Preventive Medicine and Public Health, IdiSNA, 31009 Pamplona, Spain.
| | - Dolores Corella
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, 28029 Madrid, Spain.
- Department of Preventive Medicine, University of Valencia, 46010 Valencia, Spain.
| | - Ramon Estruch
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, 28029 Madrid, Spain.
- Department of Internal Medicine, Department of Endocrinology and Nutrition Institut d' Investigacions Biomediques August Pi Sunyer (IDIBAPS), Hospital Clinic, University of Barcelona, 08007 Barcelona, Spain.
| | - Emilio Ros
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, 28029 Madrid, Spain.
- Lipid Clinic, Department of Endocrinology and Nutrition Institut d'Investigacions Biomediques August Pi Sunyer (IDIBAPS), Hospital Clinic, University of Barcelona, 08007 Barcelona, Spain.
| | - Montserrat Fitó
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, 28029 Madrid, Spain.
- Cardiovascular Risk and Nutrition Research Group (CARIN), Hospital del Mar Research Institute (IMIM), 08003 Barcelona, Spain.
| | - Fernando Arós
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, 28029 Madrid, Spain.
- Department of Cardiology, University Hospital of Álava, 01009 Vitoria, Spain.
| | - Miquel Fiol
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, 28029 Madrid, Spain.
- Illes Balears Health Research Institute (IdISBa), Hospital Son Espases, 07120 Palma de Mallorca, Spain.
| | - José Lapetra
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, 28029 Madrid, Spain.
- Department of Family, Research Unit, Distrito Sanitario Atención Primaria Sevilla, 41013 Sevilla, Spain.
| | - Cristina Ruano
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, 28029 Madrid, Spain.
- Department of Clinical Sciences, University of Las Palmas de Gran Canaria, 35001 Las Palmas, Spain.
| | - Liming Liang
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, 28029 Madrid, Spain.
- Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA.
| | - Miguel A Martínez-González
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, 28029 Madrid, Spain.
- University of Navarra, Department of Preventive Medicine and Public Health, IdiSNA, 31009 Pamplona, Spain.
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA.
| | - Frank B Hu
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA.
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA.
- Channing Division for Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, MA 02115, USA.
| | - Jordi Salas-Salvadó
- Human Nutrition Unit, Faculty of Medicine and Health Sciences, Institut d'Investigació Sanitària Pere Virgili, Rovira i Virgili University, 43201 Reus, Spain.
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, 28029 Madrid, Spain.
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Simulescu V, Ilia G, Macarie L, Merghes P. Sport and energy drinks consumption before, during and after training. Sci Sports 2019. [DOI: 10.1016/j.scispo.2018.10.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Sucrose and Sodium but not Caffeine Content Influence the Retention of Beverages in Humans Under Euhydrated Conditions. Int J Sport Nutr Exerc Metab 2019; 29:51-60. [DOI: 10.1123/ijsnem.2018-0047] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Revised: 05/02/2018] [Accepted: 05/15/2018] [Indexed: 11/18/2022]
Abstract
This study systematically examined the influence of carbohydrate (sucrose), sodium, and caffeine on the fluid retention potential of beverages under euhydrated conditions, using the beverage hydration index method. Three cohorts, each of 12 young, healthy, active men, ingested 1 L of beverages containing four different concentrations of a single component (sucrose, sodium, or caffeine) in a double-blind, crossover manner. Urine output was collected for the subsequent 4 hr. Cumulative urine output was lower and net fluid balance was higher after 10 and 20% sucrose beverages than 0 and 5% sucrose beverages (p < .05), and after 27 and 52 mmol/L sodium beverages than 7 and 15 mmol/L sodium beverages (p < .05). No difference in urine output or net fluid balance was apparent following ingestion of caffeine at concentrations of 0–400 mg/L (p = .83). Consequently, the calculated beverage hydration index was greater in beverages with higher sucrose or sodium content, but caffeine had no effect. No difference was observed in arginine vasopressin or aldosterone between any trials. These data highlight that the key drivers promoting differences in the fluid retention potential of beverages when euhydrated are energy density, likely through slowed fluid delivery to the circulation (carbohydrate content effect), or electrolyte content through improved fluid retention (sodium content effect). These data demonstrate that beverage carbohydrate and sodium content influence fluid delivery and retention in the 4 hr after ingestion, but caffeine up to 400 mg/L does not. Athletes and others can use this information to guide their daily hydration practices.
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Herden L, Weissert R. The Impact of Coffee and Caffeine on Multiple Sclerosis Compared to Other Neurodegenerative Diseases. Front Nutr 2018; 5:133. [PMID: 30622948 PMCID: PMC6308803 DOI: 10.3389/fnut.2018.00133] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Accepted: 12/10/2018] [Indexed: 12/14/2022] Open
Abstract
Background: The literature concerning the effect of coffee and caffeine on Multiple Sclerosis (MS) with focus on fatigue is investigated in this review. Potentially clinically relevant effects were also assessed in studies concerning comparable neurodegenerative diseases, such as Parkinson's disease (PD) and amyotrophic lateral sclerosis (ALS). Since the existing studies obtained very inconclusive results, we systematically reviewed these studies to summarize the evidence on the possible effects of coffee and caffeine on those disease entities. Previous studies suggested that coffee and caffeine intake is associated with a reduced risk of developing MS and other neurological diseases. Methods: The PubMed database was searched using the keywords “coffee” OR “caffeine” in combination with keywords for each of the different diseases. Besides the keyword search, we included studies by reference list search. Studies on the effects of coffee and caffeine on the single neurological diseases were included for this review. A total of 51 articles met our inclusion criteria. The reviewed articles assessed the impact of coffee and caffeine on the susceptibility for neurological diseases, as well as the effect of coffee and caffeine on disease progression and possible symptomatic effects like on performance enhancement. Results: Higher intake of coffee and caffeine was associated with a lower risk of developing PD. In some of the MS studies there, is evidence for a similar effect and experimental studies confirmed the positive impact. Interestingly in MS coffee and caffeine may have a stronger impact on disease course compared to effects on disease susceptibility. In ALS no such beneficial effect could be observed in the clinical and experimental studies. Conclusion: This literature assessment revealed that coffee and especially caffeine could have a preventative role in the development of several neurodegenerative diseases if provided in comparatively high doses. The systematic assessment indicates that coffee and caffeine intake must not be considered as a health risk. Additional clinical studies are needed to fully understand how far coffee and caffeine intake should be considered as a potential therapeutic approach for certain disease entities and conditions.
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Affiliation(s)
- Lena Herden
- Department of Neurology, University of Regensburg, Regensburg, Germany
| | - Robert Weissert
- Department of Neurology, University of Regensburg, Regensburg, Germany
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Karatzi K, Papaioannou TG, Psaltopoulou T, Tousoulis D. Caffeine Effects on Arterial Stiffness: To Drink or Not to Drink? Mayo Clin Proc 2018; 93:1149-1150. [PMID: 30077206 DOI: 10.1016/j.mayocp.2018.06.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2018] [Accepted: 06/18/2018] [Indexed: 10/28/2022]
Affiliation(s)
- Kalliopi Karatzi
- Department of Nutrition and Dietetics, Harokopio University of Athens, Athens, Greece
| | - Theodore G Papaioannou
- Biomedical Engineering Unit, First Department of Cardiology, Hippokration Hospital, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Theodora Psaltopoulou
- Department of Hygiene, Epidemiology and Medical Statistics, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - Dimitris Tousoulis
- Biomedical Engineering Unit, First Department of Cardiology, Hippokration Hospital, Medical School, National and Kapodistrian University of Athens, Athens, Greece
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Monteiro J, Alves MG, Oliveira PF, Silva BM. Pharmacological potential of methylxanthines: Retrospective analysis and future expectations. Crit Rev Food Sci Nutr 2018; 59:2597-2625. [PMID: 29624433 DOI: 10.1080/10408398.2018.1461607] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Methylated xanthines (methylxanthines) are available from a significant number of different botanical species. They are ordinarily included in daily diet, in many extremely common beverages and foods. Caffeine, theophylline and theobromine are the main methylxanthines available from natural sources. The supposedly relatively low toxicity of methylxanthines, combined with the many beneficial effects that have been attributed to these compounds through time, generated a justified attention and a very prolific ground for dedicated scientific reports. Methylxanthines have been widely used as therapeutical tools, in an intriguing range of medicinal scopes. In fact, methylxanthines have been/were medically used as Central Nervous System stimulants, bronchodilators, coronary dilators, diuretics and anti-cancer adjuvant treatments. Other than these applications, methylxanthines have also been hinted to hold other beneficial health effects, namely regarding neurodegenerative diseases, cardioprotection, diabetes and fertility. However, it seems now consensual that toxicity concerns related to methylxanthine consumption and/or therapeutic use should not be dismissed. Taking all the knowledge and expectations on the potential of methylxanthines into account, we propose a systematic look at the past and future of methylxanthine pharmacologic applications, discussing all the promise and anticipating possible constraints. Anyways, methylxanthines will still substantiate considerable meaningful research and discussion for years to come.
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Affiliation(s)
- João Monteiro
- Mass Spectrometry Centre, Department of Chemistry & CESAM, University of Aveiro, Campus Universitário de Santiago , Aveiro , Portugal
| | - Marco G Alves
- Department of Microscopy, Laboratory of Cell Biology, Unit for Multidisciplinary Research in Biomedicine (UMIB), Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto , Porto , Portugal
| | - Pedro F Oliveira
- Department of Microscopy, Laboratory of Cell Biology, Unit for Multidisciplinary Research in Biomedicine (UMIB), Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto , Porto , Portugal.,Institute of Health Research an Innovation (i3S), University of Porto , Porto , Portugal
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Acar-Tek N, Aǧagündüz D, Ayhan B. Effect of Green Coffee Consumption on Resting Energy Expenditure, Blood Pressure, and Body Temperature in Healthy Women: A Pilot Study. J Am Coll Nutr 2018; 37:691-700. [PMID: 29723112 DOI: 10.1080/07315724.2018.1461147] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
KEY TEACHING POINTS • There are several findings, and chlorogenic acid may have antihypertensive effects. • There is a significant correlation between green coffee chlorogenic acid amount and REE. • Intracellular and extracellular liquid amounts decrease following green coffee consumption (215-280 mg caffeine), and these changes are observed in individuals whose usual dietary caffeine intake is relatively both low and high. • The body temperature values of individuals whose usual dietary caffeine intake was in the 50th percentile or greater (relatively high) increased after green coffee consumption.
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Affiliation(s)
- Nilüfer Acar-Tek
- a Faculty of Health Sciences, Department of Nutrition and Dietetics , Gazi University , Besevler , Ankara , Turkey
| | - Duygu Aǧagündüz
- a Faculty of Health Sciences, Department of Nutrition and Dietetics , Gazi University , Besevler , Ankara , Turkey
| | - Büşra Ayhan
- a Faculty of Health Sciences, Department of Nutrition and Dietetics , Gazi University , Besevler , Ankara , Turkey
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Maughan RJ, Burke LM, Dvorak J, Larson-Meyer DE, Peeling P, Phillips SM, Rawson ES, Walsh NP, Garthe I, Geyer H, Meeusen R, van Loon LJC, Shirreffs SM, Spriet LL, Stuart M, Vernec A, Currell K, Ali VM, Budgett RG, Ljungqvist A, Mountjoy M, Pitsiladis YP, Soligard T, Erdener U, Engebretsen L. IOC consensus statement: dietary supplements and the high-performance athlete. Br J Sports Med 2018; 52:439-455. [PMID: 29540367 PMCID: PMC5867441 DOI: 10.1136/bjsports-2018-099027] [Citation(s) in RCA: 337] [Impact Index Per Article: 56.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/03/2018] [Indexed: 12/24/2022]
Abstract
Nutrition usually makes a small but potentially valuable contribution to successful performance in elite athletes, and dietary supplements can make a minor contribution to this nutrition programme. Nonetheless, supplement use is widespread at all levels of sport. Products described as supplements target different issues, including (1) the management of micronutrient deficiencies, (2) supply of convenient forms of energy and macronutrients, and (3) provision of direct benefits to performance or (4) indirect benefits such as supporting intense training regimens. The appropriate use of some supplements can benefit the athlete, but others may harm the athlete's health, performance, and/or livelihood and reputation (if an antidoping rule violation results). A complete nutritional assessment should be undertaken before decisions regarding supplement use are made. Supplements claiming to directly or indirectly enhance performance are typically the largest group of products marketed to athletes, but only a few (including caffeine, creatine, specific buffering agents and nitrate) have good evidence of benefits. However, responses are affected by the scenario of use and may vary widely between individuals because of factors that include genetics, the microbiome and habitual diet. Supplements intended to enhance performance should be thoroughly trialled in training or simulated competition before being used in competition. Inadvertent ingestion of substances prohibited under the antidoping codes that govern elite sport is a known risk of taking some supplements. Protection of the athlete's health and awareness of the potential for harm must be paramount; expert professional opinion and assistance is strongly advised before an athlete embarks on supplement use.
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Affiliation(s)
| | - Louise M Burke
- Sports Nutrition, Australian Institute of Sport, Canberra, Australia
- Mary MacKillop Institute for Health Research, Melbourne, Australia
| | - Jiri Dvorak
- Department of Neurology, Schulthess Clinic, Zurich, Switzerland
| | - D Enette Larson-Meyer
- Department of Family & Consumer Sciences (Human Nutrition), University of Wyoming, Laramie, Wyoming, USA
| | - Peter Peeling
- School of Human Sciences (Exercise and Sport Science), The University of Western Australia, Crawley, Western Australia, Australia
- Western Australian Institute of Sport, Mount Claremont, Australia
| | | | - Eric S Rawson
- Department of Health, Nutrition, and Exercise Science, Messiah College, Mechanicsburg, Pennsylvania, USA
| | - Neil P Walsh
- College of Health and Behavioural Sciences, Bangor University, Bangor, UK
| | - Ina Garthe
- The Norwegian Olympic and Paralympic Committee and Confederation of Sport, Oslo, Norway
| | - Hans Geyer
- Institute of Biochemistry, Center for Preventive Doping Research, German Sport University, Cologne, Germany
| | - Romain Meeusen
- Human Physiology Research Group, Vrije Universiteit Brussel, Brussel, Belgium
| | - Lucas J C van Loon
- Mary MacKillop Institute for Health Research, Melbourne, Australia
- Department of Human Biology and Movement Sciences, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Centre, Maastricht, The Netherlands
| | | | - Lawrence L Spriet
- Human Health & Nutritional Sciences, University of Guelph, Ontario, Canada
| | | | - Alan Vernec
- Department of Science and Medicine, World Anti-Doping Agency (WADA), Montreal, Canada
| | | | - Vidya M Ali
- Medical and Scientific Commission, International Olympic Committee, Lausanne, Switzerland
| | - Richard Gm Budgett
- Medical and Scientific Department, International Olympic Committee, Lausanne, Switzerland
| | | | - Margo Mountjoy
- Human Health and Nutritional Sciences, Health and Performance, Centre University of Guelph, Guelph, Ontario, Canada
- Medical and Scientific Commission Games Group, International Olympic Committee, Lausanne, Switzerland
| | - Yannis P Pitsiladis
- Medical and Scientific Commission, International Olympic Committee, Lausanne, Switzerland
| | - Torbjørn Soligard
- Medical and Scientific Department, International Olympic Committee, Lausanne, Switzerland
| | - Uğur Erdener
- Medical and Scientific Commission, International Olympic Committee, Lausanne, Switzerland
| | - Lars Engebretsen
- Medical and Scientific Department, International Olympic Committee, Lausanne, Switzerland
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IOC Consensus Statement: Dietary Supplements and the High-Performance Athlete. Int J Sport Nutr Exerc Metab 2018; 28:104-125. [PMID: 29589768 DOI: 10.1123/ijsnem.2018-0020] [Citation(s) in RCA: 270] [Impact Index Per Article: 45.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Nutrition usually makes a small but potentially valuable contribution to successful performance in elite athletes, and dietary supplements can make a minor contribution to this nutrition program. Nonetheless, supplement use is widespread at all levels of sport. Products described as supplements target different issues, including the management of micronutrient deficiencies, supply of convenient forms of energy and macronutrients, and provision of direct benefits to performance or indirect benefits such as supporting intense training regimens. The appropriate use of some supplements can offer benefits to the athlete, but others may be harmful to the athlete's health, performance, and/or livelihood and reputation if an anti-doping rule violation results. A complete nutritional assessment should be undertaken before decisions regarding supplement use are made. Supplements claiming to directly or indirectly enhance performance are typically the largest group of products marketed to athletes, but only a few (including caffeine, creatine, specific buffering agents and nitrate) have good evidence of benefits. However, responses are affected by the scenario of use and may vary widely between individuals because of factors that include genetics, the microbiome, and habitual diet. Supplements intended to enhance performance should be thoroughly trialed in training or simulated competition before implementation in competition. Inadvertent ingestion of substances prohibited under the anti-doping codes that govern elite sport is a known risk of taking some supplements. Protection of the athlete's health and awareness of the potential for harm must be paramount, and expert professional opinion and assistance is strongly advised before embarking on supplement use.
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Some Popular Energy Shots and Their Ingredients: Are They Safe and Should They Be Used? A Literature Review. BEVERAGES 2018. [DOI: 10.3390/beverages4010020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Abstract
Psychiatrists rarely enquire about caffeine intake when assessing patients. This may lead to a failure to identify caffeine-related problems and offer appropriate interventions. Excessive caffeine ingestion leads to symptoms that overlap with those of many psychiatric disorders. Caffeine is implicated in the exacerbation of anxiety and sleep disorders, and people with eating disorders often misuse it. It antagonises adenosine receptors, which may potentiate dopaminergic activity and exacerbate psychosis. In psychiatric in-patients, caffeine has been found to increase anxiety, hostility and psychotic symptoms. Assessment of caffeine intake should form part of routine psychiatric assessment and should be carried out before prescribing hypnotics. Gradual reduction in intake or gradual substitution with caffeine-free alternatives is probably preferable to abrupt cessation. Decaffeinated beverages should be provided on psychiatric wards.
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Choi Y, Rim JS, Na Y, Lee SR. Effects of dietary fermented spent coffee ground on nutrient digestibility and nitrogen utilization in sheep. ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2017; 31:363-368. [PMID: 29103281 PMCID: PMC5838341 DOI: 10.5713/ajas.17.0654] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Revised: 10/11/2017] [Accepted: 10/23/2017] [Indexed: 11/27/2022]
Abstract
OBJECTIVE The objective of the study was to determine the effect of fermented spent coffee ground (FSCG) on nutrient digestibility and nitrogen utilization in sheep. METHODS Fermentation of spent coffee ground (SCG) was conducted using Lactobacillus plantrum. Fermentation was performed at moisture content of 70% and temperature of 39°C with anaerobic air tension for 48 h. Four adult rams (initial body weight = 56.8±0.4 kg) were housed in a respiration-metabolism chamber and the treatments were: i) control (Basal diet; 0% SCG or FSCG), ii) 10% level of SCG, iii) 10% level of FSCG, and iv) 20% level of FSCG in 4×4 Latin square design. Each dietary experiment period lasted for 18-d with a 14-d of adaptation period and a 4-d of sample collection period. RESULTS In SCG fermentation experimental result, acid detergent insoluble nitrogen (ADIN) concentration of FSCG (64.5% of total N) was lower than that of non-fermented SCG (78.8% of total N). Digestibility of dry matter and organic matter was similar among treatment groups. Although crude protein (CP) digestibility of the control was greater than FSCG groups (p< 0.05), the 10% FSCG group showed greater CP digestibility and nitrogen retention than non-fermented 10% SCG group (p<0.05). Body weight gain and average daily gain were linearly decreased with increasing FSCG feeding level (p<0.05). When the feeding level of FSCG was increased, water intake was linearly increased (p<0.05). With an increasing FSCG level, dry matter intake did not differ among groups, although the gain to feed ratio tended to decrease with increasing level of FSCG (p<0.10). CONCLUSION Microbial fermentation of SCG can improve protein digestibility, thereby increasing CP digestibility and nitrogen utilization in sheep. Fermentation using microorganisms in feed ingredients with low digestibility could have a positive effect on improving the quality of raw feed.
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Affiliation(s)
- Yongjun Choi
- Department of Animal Science and Technology, Konkuk University, Seoul 05029, Korea
| | - Jong-Su Rim
- Department of Animal Science and Technology, Konkuk University, Seoul 05029, Korea
| | - Youngjun Na
- Department of Animal Science and Technology, Konkuk University, Seoul 05029, Korea
| | - Sang Rak Lee
- Department of Animal Science and Technology, Konkuk University, Seoul 05029, Korea
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Seal AD, Bardis CN, Gavrieli A, Grigorakis P, Adams JD, Arnaoutis G, Yannakoulia M, Kavouras SA. Coffee with High but Not Low Caffeine Content Augments Fluid and Electrolyte Excretion at Rest. Front Nutr 2017; 4:40. [PMID: 28868290 PMCID: PMC5563313 DOI: 10.3389/fnut.2017.00040] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Accepted: 08/02/2017] [Indexed: 02/03/2023] Open
Abstract
BACKGROUND Low levels of caffeine ingestion do not induce dehydration at rest, while it is not clear if larger doses do have an acute diuretic effect. The aim of the present investigation was to examine the acute effect of low and high levels of caffeine, via coffee, on fluid balance in habitual coffee drinkers (at least one per day) at rest. METHODS Ten healthy adults (eight males and two females; age: 27 ± 5 years, weight: 89.5 ± 14.8 kg, height: 1.75 ± 0.08 m, and body mass index: 29.1 ± 4.4 kg m-2) ingested 200 mL of water (W), coffee with low caffeine (3 mg kg-1, LCAF), or coffee with high caffeine (6 mg kg-1, HCAF) on three respective separate occasions. All sessions were performed at 09:00 in the morning in a counterbalanced, crossover manner, at least 5 days apart. Subjects remained in the laboratory while urine samples were collected every 60 min for 3 h post ingestion. RESULTS Absolute caffeine consumption was 269 ± 45 and 537 ± 89 mg for the LCAF and HCAF, respectively. Coffee ingestion at the HCAF trial induced greater diuresis during the 3-h period (613 ± 101 mL, P < 0.05), when compared to W (356 ± 53 mL) and LCAF (316 ± 38 mL). In addition, cumulative urinary osmotic excretion was significantly greater in the HCAF (425 ± 92 mmol, P < 0.05), as compared to the W (249 ± 36 mmol) and LCAF (177 ± 16 mmol) trials. CONCLUSION The data indicate that caffeine intake of 6 mg kg-1 in the form of coffee can induce an acute diuretic effect, while 3 mg kg-1 do not disturb fluid balance in healthy casual coffee drinking adults at rest.
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Affiliation(s)
- Adam D Seal
- Hydration Science Laboratory, University of Arkansas, Fayetteville, AR, United States
| | - Costas N Bardis
- Department of Nutrition and Dietetics, Harokopio University, Athens, Greece
| | - Anna Gavrieli
- Department of Nutrition and Dietetics, Harokopio University, Athens, Greece
| | - Petros Grigorakis
- Department of Nutrition and Dietetics, Harokopio University, Athens, Greece
| | - J D Adams
- Hydration Science Laboratory, University of Arkansas, Fayetteville, AR, United States
| | - Giannis Arnaoutis
- Department of Nutrition and Dietetics, Harokopio University, Athens, Greece
| | - Mary Yannakoulia
- Department of Nutrition and Dietetics, Harokopio University, Athens, Greece
| | - Stavros A Kavouras
- Hydration Science Laboratory, University of Arkansas, Fayetteville, AR, United States.,Division of Endocrinology, University of Arkansas for Medical Science, Little Rock, AR, United States
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Effect of Excessive Coffee Consumption on the Clinical Course of a Patient With Bipolar Disorder: A Case Report and Literature Review. Clin Neuropharmacol 2017. [DOI: 10.1097/wnf.0000000000000222] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Peerapen P, Ausakunpipat N, Sutthimethakorn S, Aluksanasuwan S, Vinaiphat A, Thongboonkerd V. Physiologic changes of urinary proteome by caffeine and excessive water intake. ACTA ACUST UNITED AC 2017; 55:993-1002. [DOI: 10.1515/cclm-2016-0464] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2016] [Accepted: 10/12/2016] [Indexed: 11/15/2022]
Abstract
AbstractBackground:Diurnal variations and physiologic changes of urinary proteome have been suggested in the urinary proteomics field. However, no clear evidence has been demonstrated. The present study thus aimed to define changes in urinary proteome by physiological stimuli, i.e. caffeine intake and excessive water drinking, both of which cause physiologic diuresis.Methods:Urine samples were collected from 30 healthy individuals under three different conditions: (i) morning void as the control; (ii) after drinking a cup of coffee; and (iii) after drinking 1 L of water within 20 min. Thereafter, differentially excreted proteins were analyzed by 2-DE proteomics approach and validated by Western blotting and ELISA.Results:Spot matching, quantitative intensity analysis, and ANOVA followed by Tukey’s post-hoc multiple comparisons and the Bonferroni correction revealed significant differences in levels of five protein spots among three different conditions. These proteins were identified by quadrupole time-of-flight mass spectrometry (Q-TOF MS) and/or MS/MS analyses as kininogen 1 isoform 3, β-actin, prostaglandin D synthase (PGDS), fibrinogen α-chain and immunoglobulin light chain. Among these, the decreased level of immunoglobulin was successfully validated by Western blotting and ELISA.Conclusions:These data indicated that caffeine intake and excessive water drinking could affect urinary excretion of some proteins and may affect urinary proteome analysis.
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Khondker A, Dhaliwal A, Alsop RJ, Tang J, Backholm M, Shi AC, Rheinstädter MC. Partitioning of caffeine in lipid bilayers reduces membrane fluidity and increases membrane thickness. Phys Chem Chem Phys 2017; 19:7101-7111. [DOI: 10.1039/c6cp08104e] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Caffeine partitions in lipid membranes in the head to tail interface and leads to a thickening and defluidification.
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Affiliation(s)
- Adree Khondker
- Department of Physics and Astronomy
- McMaster University
- Hamilton
- Canada
| | | | - Richard J. Alsop
- Department of Physics and Astronomy
- McMaster University
- Hamilton
- Canada
| | - Jennifer Tang
- Department of Physics and Astronomy
- McMaster University
- Hamilton
- Canada
| | - Matilda Backholm
- Department of Physics and Astronomy
- McMaster University
- Hamilton
- Canada
- Department of Applied Physics
| | - An-Chang Shi
- Department of Physics and Astronomy
- McMaster University
- Hamilton
- Canada
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McLellan TM, Caldwell JA, Lieberman HR. A review of caffeine’s effects on cognitive, physical and occupational performance. Neurosci Biobehav Rev 2016; 71:294-312. [DOI: 10.1016/j.neubiorev.2016.09.001] [Citation(s) in RCA: 253] [Impact Index Per Article: 31.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Revised: 08/26/2016] [Accepted: 09/04/2016] [Indexed: 12/31/2022]
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Milovanovic DD, Jakovljevic M, Scekic M, Djordjevic N. Caffeine consumption patterns and determinants among adolescents in Serbia. Int J Adolesc Med Health 2016; 30:/j/ijamh.ahead-of-print/ijamh-2016-0076/ijamh-2016-0076.xml. [PMID: 27740924 DOI: 10.1515/ijamh-2016-0076] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Accepted: 08/14/2016] [Indexed: 06/06/2023]
Abstract
BACKGROUND The number of adolescents who use caffeine is constantly increasing. As juvenile age is vulnerable, it is reasonable to expect that they will differently perceive reason and react to caffeine use than adults, and be more prone to unwanted physiological and psychological consequences of its consumption. AIM Analysis of the scope and pattern of caffeine consumption among adolescents in Serbia. STUDY DESIGN The cross-sectional survey was implemented in the study population of 191 Serbian adolescents during 2010. RESULTS The median daily intake of caffeine was 95.6 mg. The major source of caffeine was brewed coffee, and the most common reasons for caffeine intake were leisure, peer influence, or habit. Only 57.6% of the subjects were aware that caffeine is present in consumed beverages. Sex affected the pattern, but not the overall level, of caffeine consumption. No association between caffeine consumption and smoking status, frequency of caffeine use in the family, or negative personal experience with caffeine effects was observed. CONCLUSION Our investigation provides first and rather detailed insight into caffeine-containing beverage consumption scope and pattern among Serbian adolescents. For accurate estimation and analysis of caffeine intake in this population, randomized studies with prospective longitudinal design, caffeine content measurement, and more subjects involved are warranted.
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Affiliation(s)
- Dragana Dragas Milovanovic
- Department of Pharmacology and Toxicology, Faculty of Medical Sciences, University of Kragujevac, Serbia
| | - Mihajlo Jakovljevic
- Department of Pharmacology and Toxicology, Faculty of Medical Sciences, University of Kragujevac, Serbia
| | - Milica Scekic
- Department of Pharmacology and Toxicology, Faculty of Medical Sciences, University of Kragujevac, Serbia
| | - Natasa Djordjevic
- Department of Pharmacology and Toxicology, Faculty of Medical Sciences, University of Kragujevac, Svetozara Markovica 69, 34 000 Kragujevac, Serbia, Phone: +381 34 306 800 ext. 223, Fax: +381 34 306 800
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Sonu VK, Islam MM, Rohman MA, Mitra S. Lysozyme binding ability toward psychoactive stimulant drugs: Modulatory effect of colloidal metal nanoparticles. Colloids Surf B Biointerfaces 2016; 146:514-22. [DOI: 10.1016/j.colsurfb.2016.06.061] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Revised: 05/27/2016] [Accepted: 06/28/2016] [Indexed: 11/26/2022]
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49
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Quantum chemical exploration on the metabolic mechanisms of caffeine by flavin-containing monooxygenase. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.03.091] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Marx B, Scuvée É, Scuvée-Moreau J, Seutin V, Jouret F. [Mechanisms of caffeine-induced diuresis]. Med Sci (Paris) 2016; 32:485-90. [PMID: 27225921 DOI: 10.1051/medsci/20163205015] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Caffeine is an alkaloid which belongs to the family of methylxanthines and is present in beverages, food and drugs. Caffeine competitively antagonizes the adenosine receptors (AR), which are G protein-coupled receptors largely distributed throughout the body, including brain, heart, vessels and kidneys. Caffeine consumption has a well-known diuretic effect. The homeostasis of salt and water involves different segments of the nephron, in which adenosine plays complex roles depending on the differential expression of AR. Hence, caffeine increases glomerular filtration rate by opposing the vasoconstriction of renal afferent arteriole mediated by adenosine via type 1 AR during the tubuloglomerular feedback. Caffeine also inhibits Na(+) reabsorption at the level of renal proximal tubules. In addition, caffeine perturbs the hepatorenal reflex via sensory nerves in Mall's intrahepatic spaces. Here, we review the physiology of caffeine-induced natriuresis and diuresis, as well as the putative pathological implications.
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Affiliation(s)
- Barbara Marx
- Faculté de médecine, université de Liège, 4000 Liège, Belgique
| | - Éléonore Scuvée
- Faculté de médecine, université de Liège, 4000 Liège, Belgique
| | - Jacqueline Scuvée-Moreau
- Service de pharmacologie et laboratoire de neurophysiologie, GIGA neurosciences, université de Liège, 4000 Liège, Belgique
| | - Vincent Seutin
- Service de pharmacologie et laboratoire de neurophysiologie, GIGA neurosciences, université de Liège, 4000 Liège, Belgique
| | - François Jouret
- GIGA cardiovasculaires, université de Liège, Avenue Hippocrate, 13, 4000 Liège, Belgique - Service de néphrologie, CHU de Liège, 4000 Liège Belgique
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