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Aonso-Diego G, Krotter A, García-Pérez Á. Prevalence of energy drink consumption world-wide: A systematic review and meta-analysis. Addiction 2024; 119:438-463. [PMID: 37967848 DOI: 10.1111/add.16390] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Accepted: 09/27/2023] [Indexed: 11/17/2023]
Abstract
BACKGROUND AND AIMS The increasing market for energy drinks (EDs) in recent years, as well as the health risks caused by their consumption, prompt calls to estimate the prevalence of ED use among different countries. This systematic review and meta-analysis aimed to synthesize the prevalence of ED use in different continents and age groups. METHOD We searched two databases (i.e. PubMed and PsycInfo) on 31 March 2023 to identify studies reporting the prevalence of ED use. A total of 192 studies (196 distinct samples; n = 1 120 613; 53.37% males) from the United States, Europe, Asia, Oceania and Africa were included in the analysis. A random-effects model was applied to estimate the overall pooled prevalence at several time-periods. Subgroup analyses were performed to provide prevalence based on continent and age group. The quality of articles was assessed using Joana Brigg's Institute (JBI) critical appraisal checklist. Measurements included prevalence of ED use (i.e. life-time, past 12 months, past 30 days, past 7 days and daily use), continent and age group (i.e. children, adolescents, young adults and adults). RESULTS The life-time ED use world-wide-pooled prevalence was estimated to be 54.7% [95% confidence interval (CI) = 48.8-60.6; I2 = 99.80], 43.4% (95% CI = 36.1-50.6; I2 = 99.92) in the past 12 months, 32.3% (95% CI = 28.8-35.8; I2 = 99.82) in the past 30 days, 21.6% (95% CI = 18.7-24.5; I2 = 99.95) in the past 7 days and 8.82% (95% CI = 6.3-11.4; I2 = 99.95) daily ED use. Subgroups analyses showed significant differences in ED life-time use within age groups (P = 0.002) and continents (P = 0.035). CONCLUSIONS The world-wide prevalence of energy drink use appears to be high, particularly among adolescents and young adults.
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Affiliation(s)
| | - Andrea Krotter
- Department of Psychology, University of Oviedo, Oviedo, Spain
| | - Ángel García-Pérez
- Department of Psychology, Sociology and Philosophy, University of León, León, Spain
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Effects of Chronic Administration of Green Tea Ethanol Extract on Sleep Architecture in Mice: A Comparative Study with a Representative Stimulant Caffeine. Nutrients 2023; 15:nu15041042. [PMID: 36839400 PMCID: PMC9967785 DOI: 10.3390/nu15041042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 02/14/2023] [Accepted: 02/18/2023] [Indexed: 02/22/2023] Open
Abstract
Wakefulness is defined as a state in which individuals can react to a change in situations. The number of people staying awake and compensating for lack of sleep has increased in recent years. Caffeine, a representative stimulant, is the most extensively consumed compound globally and is mainly consumed through coffee. Although green tea (Camellia sinensis L.) contains high caffeine content like coffee, its arousal-inducing effects have not yet been studied. In the present study, we aimed to identify the arousal-inducing effect of GT during a chronic administration period (three weeks) using analysis of sleep architecture. Treatment with GT (1500 mg/kg) significantly elevated the sleep latency and wakefulness throughout the treatment period, and chronic administration of GT consistently maintained an increase in wakefulness for up to 3 h. During the treatment period, the arousal-inducing effect of GT (1500 mg/kg) occurred without any change in the tolerance phenomenon or withdrawal symptoms, similar to that observed with caffeine (25 mg/kg). GT (1500 mg/kg) containing 95.6 mg/kg of caffeine did not produce a better arousal-inducing effect than caffeine at 25 mg/kg. These results indicate that the arousal-inducing effect of GT persisted for three weeks without adverse effects and that GT can control the arousal-inducing effects of caffeine due to the hypnotic effects of its other constituents.
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Secondary School Students and Caffeine: Consumption Habits, Motivations, and Experiences. Nutrients 2023; 15:nu15041011. [PMID: 36839369 PMCID: PMC9965339 DOI: 10.3390/nu15041011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 02/16/2023] [Accepted: 02/16/2023] [Indexed: 02/22/2023] Open
Abstract
Adolescents may be particularly vulnerable to the effects of caffeine due to a lack of tolerance, their small size, changing brain physiology, and increasing independence. Concerns about adolescent caffeine consumption relate to potentially serious physiological and psychological effects following consumption. Motivations driving caffeine intake are not well understood among adolescents but are important to understand to reduce harmful behavioural patterns. This study explored caffeine consumption habits (sources, amount, frequency) of New Zealand adolescents; and factors motivating caffeine consumption and avoidance. The previously validated caffeine consumption habits questionnaire (CaffCo) was completed by 216 participants (15-18 years), with most (94.9%) consuming at least one caffeinated product daily. Chocolate, coffee, tea, and kola drinks were the most consumed sources. The median caffeine intake was 68 mg·day-1. Gender (boy) and being employed influenced the source, but not the quantity of caffeine consumed. One-fifth (21.2%) of adolescents consumed more than the recommended European Food Safety Authority (EFSA) safe level (3 mg·kg-1·day-1). Taste, energy, and temperature were the main motivators for consumption, and increased energy, excitement, restlessness, and sleep disturbances were reported effects following caffeine consumption. This study provides information on caffeinated product consumption among New Zealand adolescents, some of whom consumed caffeine above the EFSA safe level. Public health initiatives directed at adolescents may be important to reduce potential caffeine-related harm.
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Cadoni C, Peana AT. Energy drinks at adolescence: Awareness or unawareness? Front Behav Neurosci 2023; 17:1080963. [PMID: 36891321 PMCID: PMC9986288 DOI: 10.3389/fnbeh.2023.1080963] [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: 10/26/2022] [Accepted: 02/06/2023] [Indexed: 02/22/2023] Open
Abstract
Energy drinks (EDs) are beverages similar to soft drinks, characterized by high caffeine concentrations with additional ingredients like taurine and vitamins, marketed for boosting energy, reducing tiredness, increasing concentration, and for their ergogenic effect. The majority of consumers are children, adolescents, and young athletes. Although EDs companies claim about the ergogenic and remineralizing properties of their products, there is a serious lack of evidence at preclinical as well as clinical level to validate their benefits. The regular intake and long-term consequences of these caffeinated drinks are not well documented, especially the possible negative effects in adolescents whose brain is still developing. EDs combined with alcohol are also gaining popularity among adolescents and different publications indicate that this combined consumption might increase the risk to develop an alcohol use disorder, as well as produce serious adverse cardiovascular effects. There is an increasing need to disseminate knowledge on EDs damage on health, so that adolescents can be aware about the potential harmful outcomes of consuming these drinks.
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Affiliation(s)
- Cristina Cadoni
- Department of Biomedical Sciences, Institute of Neuroscience, National Research Council of Italy, Cagliari, Italy
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Effects of Caffeine and Caffeinated Beverages in Children, Adolescents and Young Adults: Short Review. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph182312389. [PMID: 34886115 PMCID: PMC8656548 DOI: 10.3390/ijerph182312389] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 11/20/2021] [Accepted: 11/22/2021] [Indexed: 12/03/2022]
Abstract
The prevalence of ED consumption has increased over the past 10–15 years. Studies describing the effects of caffeine and caffeinated beverages show confusing results, so it seems important to regularly summarize the available facts, and in more detail. By a thorough analysis of more than 156 scientific papers, the authors describe the molecular background of absorption, as well as the positive and negative effects of different dosages of caffeine, just like its effects in physical activity and performance. ED and EDwA consumption is a regular habit of not only adults, but nowadays even of children and adolescents. There are no safe dosages described of caffeine or ED consumption for children. There are no positive short- or long-term effects of these compounds/products concerning developing brain functions, psycho-motor functions, or social development. Instead, there are many unpleasant side effects, and symptoms of regular or higher-dose ED consumption, especially at younger ages. This mini review describes many details of these unpleasant side effects, their severity, and motivations for consuming these compounds/products. In a quantitative research in Hungary (10–26 years, mean age: 15.6 ± 3.8 y, 1459 subjects, randomly chosen population), a survey based on a questionnaire asking people about their ED consumption habits was conducted. According to the data, 81.8% of the participants consumed EDs at least once, and 63.3% tried several products of the kind. A positive correlation was found between age and consumption (p < 0.001). The results show that a high proportion of this group often consumed EDwA, in many cases leading to harmful side-effects of caffeine overdose. In a sample of Hungarian high school and college students (17–26 years), ED consumption matched the international data, and only 19.7% of respondents did not use EDs at all (had never tasted an ED in their life).
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Caffeine Consumption Habits of New Zealand Tertiary Students. Nutrients 2021; 13:nu13051493. [PMID: 33924957 PMCID: PMC8145313 DOI: 10.3390/nu13051493] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 04/20/2021] [Accepted: 04/24/2021] [Indexed: 12/23/2022] Open
Abstract
Adverse effects associated with excessive caffeine consumption combined with increasing numbers and availability of caffeine-containing products are causes for concern. Tertiary students may be at increased risk of consuming excessive amounts of caffeine due to seeking caffeinated products with well-known wakefulness effects and cognitive benefits. This study explored caffeine consumption habits of New Zealand tertiary students (317; ≥16-years) using a previously validated caffeine consumption habits (CaffCo) questionnaire. Most (99.1%) regularly consumed caffeinated products, especially chocolate, coffee and tea, with coffee, tea and energy drinks contributing most to total caffeine intake. Median estimated caffeine intake was 146.73 mg·day−1, or 2.25 mg·kgbw−1·day−1. Maximum and minimum intakes were 1988.14 mg·day−1 (23.51 mg·kgbw−1·day−1) and 0.07 mg·day−1 (0.02 mg·kgbw−1·day−1), respectively. One-third (34.4%) of caffeine consumers ingested caffeine above the adverse effect level (3 mg·kgbw−1·day−1) and 14.3% above the safe limit (400 mg·day−1). Most caffeine consumers (84.7%), reported experiencing at least one ‘adverse symptom’ post-caffeine consumption, of which 25.7% reported effects leading to distress or negatively impacting their life. Experiencing ‘adverse symptoms’ did not, however, curtail consumption in the majority of symptomatic participants (~77%). Public health initiatives directed at tertiary students may be important to reduce potential caffeine-related harm.
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Tennent R, Ali A, Wham C, Rutherfurd-Markwick K. Narrative Review: Impact of Genetic Variability of CYP1A2, ADORA2A, and AHR on Caffeine Consumption and Response. J Caffeine Adenosine Res 2020. [DOI: 10.1089/caff.2020.0016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Affiliation(s)
- Rebecca Tennent
- School of Sport, Exercise and Nutrition, College of Health, Massey University, North Shore City, New Zealand
| | - Ajmol Ali
- School of Sport, Exercise and Nutrition, College of Health, Massey University, North Shore City, New Zealand
- Centre for Metabolic Health Research and Massey University, North Shore City, New Zealand
| | - Carol Wham
- School of Sport, Exercise and Nutrition, College of Health, Massey University, North Shore City, New Zealand
- Centre for Metabolic Health Research and Massey University, North Shore City, New Zealand
| | - Kay Rutherfurd-Markwick
- Centre for Metabolic Health Research and Massey University, North Shore City, New Zealand
- School of Health Sciences, Massey University, North Shore City, New Zealand
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Rowe K, Wham C, Rutherfurd-Markwick K, Ali A. CaffCo: A Valid and Reliable Tool to Assess Caffeine Consumption Habits, Caffeine Expectancies, and Caffeine Withdrawal Effects in Adults. J Caffeine Adenosine Res 2020. [DOI: 10.1089/caff.2020.0015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Karli Rowe
- School of Sport, Exercise and Nutrition, College of Health, Massey University, Auckland, New Zealand
| | - Carol Wham
- School of Sport, Exercise and Nutrition, College of Health, Massey University, Auckland, New Zealand
- Centre for Metabolic Health Research, Massey University, Auckland, New Zealand
| | - Kay Rutherfurd-Markwick
- Centre for Metabolic Health Research, Massey University, Auckland, New Zealand
- School of Health Sciences, College of Health, Massey University, Auckland, New Zealand
| | - Ajmol Ali
- School of Sport, Exercise and Nutrition, College of Health, Massey University, Auckland, New Zealand
- Centre for Metabolic Health Research, Massey University, Auckland, New Zealand
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Factors Influencing Energy Drink Consumption in Participants and Viewers of Extreme Sports. J Nutr Metab 2020; 2020:9382521. [PMID: 33083056 PMCID: PMC7563047 DOI: 10.1155/2020/9382521] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Accepted: 09/21/2020] [Indexed: 01/12/2023] Open
Abstract
Objective To quantify energy drink consumption and influences affecting consumption in those who participate in or watch extreme sports. Methods An online survey, informed by focus groups, was administered via Quadrics®. Advertisement was via social media, emailing extreme sport clubs, flyers at extreme sport locations, and word of mouth. Participation was limited to those >18 y who watched and/or participated in extreme sports. The study was conducted in New Zealand, with international online availability. Variables measured comprised age, sex, energy drink consumption, reasons for their use, extreme sport viewing, advertising, and sponsorship. Logistic regression models were utilised. Results Amongst participants who completed the questionnaire (n = 247), the mean (SD) age was 26.2 (8.2) y, 40.5% were female, 57.9% consumed energy drinks, and 25.5% consumed >one per week. For every year older, odds of consuming energy drinks were 3.1% lower (p=0.04). A 31% increase in energy drink consumption for every single increase of viewing extreme sport per week was observed (p=0.009); however, reported viewing of advertising was not associated with increased consumption. Conclusions A large proportion of extreme sport enthusiasts regularly consume energy drinks, especially younger adults. Extreme sport viewing, where energy drink sponsorship is common, appears to increase their consumption, even if not considered advertising by the viewers themselves.
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Booth N, Saxton J, Rodda SN. Estimates of Caffeine Use Disorder, Caffeine Withdrawal, Harm and Help-seeking in New Zealand: A cross-sectional survey. Addict Behav 2020; 109:106470. [PMID: 32485545 DOI: 10.1016/j.addbeh.2020.106470] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 05/09/2020] [Accepted: 05/11/2020] [Indexed: 12/29/2022]
Abstract
BACKGROUND Caffeine Use Disorder (CUD) is not yet formally recognized in the DSM-5, but emerging evidence suggests CUD could impact up to one in five people. The primary aim of this study was to estimate levels of caffeine consumption and its associations with CUD and withdrawal, taking socio-demographic characteristics (age, gender, ethnicity, income) into account. Secondary aims were to measure caffeine-related harm and treatment preferences. METHODS We administered an online cross-sectional survey via Facebook to a convenience sample of 2379 adults in New Zealand. Caffeine consumption was assessed across six products: coffee, tea, energy drinks, cola, alcohol mixed with caffeine, and other products (e.g., caffeine pills, sports supplements). RESULTS 20% of participants met proposed criteria for CUD, with 30% meeting DSM-5 criteria for caffeine withdrawal. Moderate (200-400 mg per day) and high consumption (>400 mg per day) was associated with a three-fold increase in the odds of CUD and a two-fold increase in the odds of withdrawal. Women and current smokers were at higher risk of CUD and withdrawal even at moderate consumption levels. Nearly 85% of respondents experienced at least one caffeine-related harm in the past 12-months. The number of harms increased with level of caffeine consumption. Nearly 50% indicated a self-help treatment for caffeine reduction would be of interest. CONCLUSIONS High rates of CUD and caffeine withdrawal amongst moderate caffeine users, women and smokers suggests caffeine consumption guidelines may need refinement. Caffeine-related harm that is not clinically meaningful may still be of concern to individuals and warrants further investigation.
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Affiliation(s)
- N Booth
- School of Population Health, University of Auckland, New Zealand
| | - J Saxton
- School of Population Health, University of Auckland, New Zealand
| | - S N Rodda
- School of Population Health, University of Auckland, New Zealand
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Ali A, Wham C, Wolber F, Dickens M, O'Keeffe K, Thunders M, Thomas J, Starck C, Rutherfurd-Markwick K. The Highs and Lows of Caffeine Intake in New Zealand Children. J Caffeine Adenosine Res 2018. [DOI: 10.1089/caff.2017.0035] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Affiliation(s)
- Ajmol Ali
- School of Sport, Exercise and Nutrition, Massey University, Auckland, New Zealand
- Centre for Metabolic Health Research, Massey University, Palmerston North, New Zealand
| | - Carol Wham
- School of Sport, Exercise and Nutrition, Massey University, Auckland, New Zealand
- Centre for Metabolic Health Research, Massey University, Palmerston North, New Zealand
| | - Fran Wolber
- Centre for Metabolic Health Research, Massey University, Palmerston North, New Zealand
- Massey Institute of Food Science and Technology, Massey University, Palmerston North
| | - Martin Dickens
- Centre for Metabolic Health Research, Massey University, Palmerston North, New Zealand
- School of Health Sciences, Massey University, Auckland, New Zealand
| | - Karyn O'Keeffe
- Centre for Metabolic Health Research, Massey University, Palmerston North, New Zealand
- Sleep/Wake Research Centre, Massey University, Wellington, New Zealand
| | - Michelle Thunders
- Centre for Metabolic Health Research, Massey University, Palmerston North, New Zealand
- Department of Pathology and Molecular Medicine, University of Otago, Wellington, New Zealand
| | - Judy Thomas
- Centre for Metabolic Health Research, Massey University, Palmerston North, New Zealand
- School of Health Sciences, Massey University, Auckland, New Zealand
| | - Carlene Starck
- Centre for Metabolic Health Research, Massey University, Palmerston North, New Zealand
- Riddet Institute, Massey University, Palmerston North, New Zealand
| | - Kay Rutherfurd-Markwick
- Centre for Metabolic Health Research, Massey University, Palmerston North, New Zealand
- School of Health Sciences, Massey University, Auckland, New Zealand
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Selected Literature Watch. JOURNAL OF CAFFEINE RESEARCH 2014. [DOI: 10.1089/jcr.2014.1243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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