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He H, Liu K, Liu M, Yang AJ, Cheng KW, Lu LW, Liu B, Chen JH. The impact of medium-chain triglycerides on weight loss and metabolic health in individuals with overweight or obesity: A systematic review and meta-analysis. Clin Nutr 2024; 43:1755-1768. [PMID: 38936302 DOI: 10.1016/j.clnu.2024.06.016] [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: 12/25/2023] [Revised: 06/17/2024] [Accepted: 06/17/2024] [Indexed: 06/29/2024]
Abstract
BACKGROUNDS The efficacy of medium-chain triglycerides (MCTs) for weight management and mitigating metabolic disorders among individuals with overweight and obesity remains a topic of ongoing discussion. Notably, there is a gap in the distinction between pure MCTs and medium-long-chain triglycerides (MLCTs). METHODS This meta-analysis investigates the efficacy of MCTs on weight loss and glucolipid metabolism in these populations, explicitly evaluating the differential effects of pure MCTs and MLCTs. We performed a random-effects meta-analysis on relevant studies examining weight loss and glucolipid parameters, incorporating a subgroup analysis conducted based on intervention types, pure MCTs versus MLCTs. RESULTS Our findings revealed diets enriched with MCTs are more effective in achieving weight reduction (WMD: -1.53%; 95% CI: -2.44, -0.63; p < 0.01), particularly those containing pure MCTs (WMD: -1.62%; 95% CI: -2.78, -0.46; p < 0.01), compared to long-chain fatty acids (LCTs) enriched diets. However, our subgroup analysis indicates that an MLCTs-enriched diet did not significantly reduce weight loss. Additionally, MCTs-enriched diets were associated with significant reductions in blood triglyceride levels and Homeostatic Model Assessment for Insulin Resistance (HOMA-IR) scores, compared to LCTs-enriched diets. CONCLUSIONS Hence, the authors recommend incorporating pure MCTs in dietary interventions for individuals with overweight and obesity, particularly those with comorbidities such as dyslipidemia and impaired glucose metabolism.
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Affiliation(s)
- Hui He
- The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou 511436, China
| | - Kang Liu
- The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou 511436, China
| | - Min Liu
- Department of Pathogen Biology, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou 510515, China
| | - Ai-Jia Yang
- Institute for Innovative Development of Food Industry, Shenzhen University, Shenzhen 518060, China; Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China; Department of Food Science and Engineering, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China
| | - Ka-Wing Cheng
- Institute for Innovative Development of Food Industry, Shenzhen University, Shenzhen 518060, China; Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China; Department of Food Science and Engineering, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China
| | - Louise Weiwei Lu
- School of Biological Sciences, Faculty of Science, The University of Auckland, Auckland, New Zealand. louise.%
| | - Bin Liu
- Department of Traditional Chinese Medicine, The Second Affiliated Hospital of Guangzhou Medical University, 250 Changgangdong Road, Guangzhou 510260, China.
| | - Jie-Hua Chen
- Institute for Innovative Development of Food Industry, Shenzhen University, Shenzhen 518060, China; Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China; Department of Food Science and Engineering, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China.
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Yang JM, Long Y, Ye H, Wu YL, Zhu Q, Zhang JH, Huang H, Zhong YB, Luo Y, Wang MY. Effects of rapeseed oil on body composition and glucolipid metabolism in people with obesity and overweight: a systematic review and meta-analysis. Eur J Clin Nutr 2024; 78:6-18. [PMID: 37740067 DOI: 10.1038/s41430-023-01344-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 09/07/2023] [Accepted: 09/11/2023] [Indexed: 09/24/2023]
Abstract
To investigate the effects of rapeseed oil on body composition, blood glucose and lipid metabolism in people with overweight and obesity compared to other cooking oils. We searched eight databases for randomized controlled studies (including randomized crossover trials). The risk of bias for the included studies was assessed using the Cochrane Risk of Bias 2.0 tool. The Grading of Recommendations Assessment Development and Evaluation (GRADE) criteria were used to evaluate the quality of the outcomes. The methodological quality of the included studies was assessed using the Physiotherapy Evidence Database (PEDro) scale. Sensitivity analysis was used to check the stability of the pooled results. Statistical analysis was carried out using Review Manager 5.3 software. As a result, fifteen randomized controlled studies (including six parallel studies and nine crossover studies) were included in this study. Compared to other edible oils, rapeseed oil significantly reduced low density lipoprotein cholesterol (LDL-C) (MD = -0.14 mmol/L, 95% CI: -0.21, -0.08, I2 = 0%, P < 0.0001), apolipoprotein B (ApoB) (MD = -0.03 g/L, 95% CI: -0.05, -0.01, I2 = 0%, P = 0.0003), ApoB/ApoA1 (MD = -0.02, 95% CI: -0.04, -0.00, I2 = 0%, P = 0.02) and insulin (MD = -12.45 pmol/L, 95% CI: -19.61, -5.29, I2 = 37%, P = 0.0007) levels, and increased fasting glucose (MD = 0.16 mmol/L, 95% CI: 0.05, 0.27, I2 = 27%, P = 0.003) levels. However, the differences in body weight and body composition between rapeseed oil and control oils were not significant. In a word, rapeseed oil is effective in reducing LDL-C, ApoB and ApoB/ApoA1 levels in people with overweight and obesity, which is helpful in preventing and reducing the risk of atherosclerosis. PROSPERO registration number: CRD42022333436.
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Affiliation(s)
- Jia-Ming Yang
- Department of Rehabilitation Medicine, First Affiliated Hospital of Gannan Medical University, Ganzhou, China
- Gannan Medical University, Ganzhou, China
| | - Yi Long
- Gannan Medical University, Ganzhou, China
| | - Hua Ye
- Gannan Medical University, Ganzhou, China
| | - Yan-Lin Wu
- Gannan Medical University, Ganzhou, China
| | - Qiang Zhu
- Department of Rehabilitation Medicine, First Affiliated Hospital of Gannan Medical University, Ganzhou, China
| | - Jia-Hong Zhang
- Department of Rehabilitation Medicine, First Affiliated Hospital of Gannan Medical University, Ganzhou, China
| | - Hui Huang
- Department of Rehabilitation Medicine, First Affiliated Hospital of Gannan Medical University, Ganzhou, China
| | - Yan-Biao Zhong
- Department of Rehabilitation Medicine, First Affiliated Hospital of Gannan Medical University, Ganzhou, China
- Ganzhou Intelligent Rehabilitation Technology Innovation Center, Ganzhou, China
| | - Yun Luo
- Department of Rehabilitation Medicine, First Affiliated Hospital of Gannan Medical University, Ganzhou, China
- Ganzhou Key Laboratory of Rehabilitation Medicine, Ganzhou, China
| | - Mao-Yuan Wang
- Department of Rehabilitation Medicine, First Affiliated Hospital of Gannan Medical University, Ganzhou, China.
- Ganzhou Key Laboratory of Rehabilitation Medicine, Ganzhou, China.
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Xiao Z, Tang F, Zhang L, Li S, Wang S, Huo Q, Yang B, Zhang C, Wang D, Li Q, Wei L, Guo T, Qu C, Lu K, Zhang Y, Guo L, Li J, Li N. The Brassica napus fatty acid exporter FAX1-1 contributes to biological yield, seed oil content, and oil quality. BIOTECHNOLOGY FOR BIOFUELS 2021; 14:190. [PMID: 34587987 PMCID: PMC8482660 DOI: 10.1186/s13068-021-02035-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 09/07/2021] [Indexed: 06/01/2023]
Abstract
BACKGROUND In the oilseed crop Brassica napus (rapeseed), various metabolic processes influence seed oil content, oil quality, and biological yield. However, the role of plastid membrane proteins in these traits has not been explored. RESULTS Our genome-wide association study (GWAS) of 520 B. napus accessions identified the chloroplast membrane protein-localized FATTY ACID EXPORTER 1-1 (FAX1-1) as a candidate associated with biological yield. Seed transcript levels of BnaFAX1-1 were higher in a cultivar with high seed oil content relative to a low-oil cultivar. BnaFAX1-1 was localized to the plastid envelope. When expressed in Arabidopsis thaliana, BnaFAX1-1 enhanced biological yield (total plant dry matter), seed yield and seed oil content per plant. Likewise, in the field, B. napus BnaFAX1-1 overexpression lines (BnaFAX1-1-OE) displayed significantly enhanced biological yield, seed yield, and seed oil content compared with the wild type. BnaFAX1-1 overexpression also up-regulated gibberellic acid 4 (GA4) biosynthesis, which may contribute to biological yield improvement. Furthermore, oleic acid (C18:1) significantly increased in BnaFAX1-1 overexpression seeds. CONCLUSION Our results indicated that the putative fatty acid exporter BnaFAX1-1 may simultaneously improve seed oil content, oil quality and biological yield in B. napus, providing new approaches for future molecular breeding.
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Affiliation(s)
- Zhongchun Xiao
- Chongqing Engineering Research Center for Rapeseed, College of Agronomy and Biotechnology, Southwest University, Chongqing, 400715, China
- Academy of Agricultural Sciences, Southwest University, Beibei, Chongqing, 400715, China
- College of Biology and Chemistry, Xingyi Normal University for Nationalities, Xingyi, 562400, Guizhou, China
| | - Fang Tang
- Chongqing Engineering Research Center for Rapeseed, College of Agronomy and Biotechnology, Southwest University, Chongqing, 400715, China
- Academy of Agricultural Sciences, Southwest University, Beibei, Chongqing, 400715, China
| | - Liyuan Zhang
- Chongqing Engineering Research Center for Rapeseed, College of Agronomy and Biotechnology, Southwest University, Chongqing, 400715, China
- Academy of Agricultural Sciences, Southwest University, Beibei, Chongqing, 400715, China
| | - Shengting Li
- Chongqing Engineering Research Center for Rapeseed, College of Agronomy and Biotechnology, Southwest University, Chongqing, 400715, China
- Academy of Agricultural Sciences, Southwest University, Beibei, Chongqing, 400715, China
| | - Shufeng Wang
- College of Resources and Environment, and Interdisciplinary Research Center for Agriculture Green Development in Yangtze River Basin, Southwest University, Chongqing, 400715, China
| | - Qiang Huo
- Chongqing Engineering Research Center for Rapeseed, College of Agronomy and Biotechnology, Southwest University, Chongqing, 400715, China
- Academy of Agricultural Sciences, Southwest University, Beibei, Chongqing, 400715, China
| | - Bo Yang
- Chongqing Engineering Research Center for Rapeseed, College of Agronomy and Biotechnology, Southwest University, Chongqing, 400715, China
- Academy of Agricultural Sciences, Southwest University, Beibei, Chongqing, 400715, China
| | - Chao Zhang
- Chongqing Engineering Research Center for Rapeseed, College of Agronomy and Biotechnology, Southwest University, Chongqing, 400715, China
- Academy of Agricultural Sciences, Southwest University, Beibei, Chongqing, 400715, China
| | - Daojie Wang
- State Key Laboratory of Crop Stress Adaptation and Improvement, Key Laboratory of Plant Stress Biology, School of Life Sciences, Henan University, Kaifeng, 475004, China
| | - Qing Li
- Hybrid Rapeseed Research Center of Shaanxi Province, Shaanxi, China
| | - Lijuan Wei
- Chongqing Engineering Research Center for Rapeseed, College of Agronomy and Biotechnology, Southwest University, Chongqing, 400715, China
- Academy of Agricultural Sciences, Southwest University, Beibei, Chongqing, 400715, China
| | - Tao Guo
- College of Resources and Environment, and Interdisciplinary Research Center for Agriculture Green Development in Yangtze River Basin, Southwest University, Chongqing, 400715, China
| | - Cunmin Qu
- Chongqing Engineering Research Center for Rapeseed, College of Agronomy and Biotechnology, Southwest University, Chongqing, 400715, China
- Academy of Agricultural Sciences, Southwest University, Beibei, Chongqing, 400715, China
| | - Kun Lu
- Chongqing Engineering Research Center for Rapeseed, College of Agronomy and Biotechnology, Southwest University, Chongqing, 400715, China
- Academy of Agricultural Sciences, Southwest University, Beibei, Chongqing, 400715, China
| | - Yanfeng Zhang
- Hybrid Rapeseed Research Center of Shaanxi Province, Shaanxi, China
| | - Liang Guo
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, China.
| | - Jiana Li
- Chongqing Engineering Research Center for Rapeseed, College of Agronomy and Biotechnology, Southwest University, Chongqing, 400715, China.
- Academy of Agricultural Sciences, Southwest University, Beibei, Chongqing, 400715, China.
| | - Nannan Li
- College of Resources and Environment, and Interdisciplinary Research Center for Agriculture Green Development in Yangtze River Basin, Southwest University, Chongqing, 400715, China.
- Academy of Agricultural Sciences, Southwest University, Beibei, Chongqing, 400715, China.
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Pastor R, Bouzas C, Tur JA. Beneficial effects of dietary supplementation with olive oil, oleic acid, or hydroxytyrosol in metabolic syndrome: Systematic review and meta-analysis. Free Radic Biol Med 2021; 172:372-385. [PMID: 34153478 DOI: 10.1016/j.freeradbiomed.2021.06.017] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 06/14/2021] [Accepted: 06/15/2021] [Indexed: 12/29/2022]
Abstract
BACKGROUND AND AIMS Olive oil and components might have a beneficial effect on Metabolic Syndrome (MetS). The aim of this review and meta-analysis was to assess whether those effects are related to hydroxytyrosol or oleic acid contents, or the combination of them as olive oil, and how powerful is this effect. METHODS A systematic literature search was performed in MEDLINE via Pubmed, Web of Science (WOS) core collection, and Virtual Health Library (VHL) via LILACS and IBECS (Spain). MeSH terms used were "obesity", "body weight", "body mass index", "adipose tissue", "lipid metabolism", "LDL", "HDL", "VLDL", "insulin resistance", "glucose", "insulin", "hypertension", "arterial pressure", "olive oil", "oleic acid", and other (non-MeSH) terms: "total antioxidant capacity", "total antioxidant status", "hydroxytyrosol" (PROSPERO ID: CRD42021247614). Results of the included studies were meta-analyzed with the RevMan 5.3 program, assuming a random effects model. RESULTS 76 articles (67 different trials) were identified. Hydroxytyrosol had no effect on MetS [combined standardized mean differences (SMD) = 0.01 (CI 95%: [-0.23, 0.25], I2 = 83%; p = 0.920)]. Oleic acid had no significant beneficial effect on MetS [SMD = 0.03 (CI 95%: [-0.01, 0.07], I2 = 0%); p = 0.150], but it improved lipid profile [SMD = 0.06 (CI 95%: [-0.00, 0.12], I2 = 0%); p = 0. 050]. Olive oil had no effect on MetS [SMD = -0.01 (CI 95%: [-0.05, 0.03]), I2 = 55%; p = 0.550)]. The supplementation with hydroxytyrosol, oleic acid or olive oil showed a beneficial effect on antioxidant capacity related to components of MetS [SMD = 0.31 (CI 95%: [-0.34, 0.95], I2 = 81%)]; p = 0.35). CONCLUSION Most articles compared olive oil and oleic acid with other strategies specially designed for MetS management. Our findings suggest that olive oil or oleic acid consumption are as good as the other strategies to manage MetS.
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Affiliation(s)
- Rosario Pastor
- Research Group on Community Nutrition and Oxidative Stress, University of the Balearic Islands-IUNICS & IDISBA, E-07122, Palma de Mallorca, Spain; Faculty of Health Sciences, Catholic University of Avila, 05005, Avila, Spain.
| | - Cristina Bouzas
- Research Group on Community Nutrition and Oxidative Stress, University of the Balearic Islands-IUNICS & IDISBA, E-07122, Palma de Mallorca, Spain; Faculty of Health Sciences, Catholic University of Avila, 05005, Avila, Spain; CIBEROBN (Physiopathology of Obesity and Nutrition), Instituto de Salud Carlos III, 28029, Madrid, Spain.
| | - Josep A Tur
- Research Group on Community Nutrition and Oxidative Stress, University of the Balearic Islands-IUNICS & IDISBA, E-07122, Palma de Mallorca, Spain; CIBEROBN (Physiopathology of Obesity and Nutrition), Instituto de Salud Carlos III, 28029, Madrid, Spain.
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Orhan C, Kucuk O, Sahin N, Tuzcu M, Sahin K. Lycopene supplementation does not change productive performance but lowers egg yolk cholesterol and gene expression of some cholesterol-related proteins in laying hens. Br Poult Sci 2020; 62:227-234. [PMID: 33085516 DOI: 10.1080/00071668.2020.1839017] [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] [Indexed: 10/23/2022]
Abstract
1. This work examined the effects of purified lycopene (LYC) supplementation or a source of LYC as tomato powder (TP) on productive performance, egg yolk cholesterol levels as well as gene expression related to mechanism and regulation of cholesterol.2. One hundred and fifty laying hens (Lohman LSL, hybrid) were randomly divided into one of three treatments, with 10 replicates of five hens per cage, totalling 50 hens per treatment. The hens were fed either a standard diet (control) or a standard diet supplemented with 20 mg purified lycopene/kg diet (LYC) or an equal amount of lycopene-containing tomato powder (TP) for 12 weeks.3. Feed consumption, egg production, and feed efficiency remained similar among treatments (P ≥ 0.27). Supplementing lycopene, either as a purified form or in TP, increased the levels of serum and egg yolk lycopene and reduced serum and egg yolk cholesterol concentrations (P < 0.001). Supplementation in either form decreased gene expression for intestinal NPC1L1, MTP, ACAT2, hepatic SREBP1c, ACLY, and LXRα but increased hepatic ABCG5 and ABCG8 (P < 0.001).4. The results of the present work revealed that egg yolk cholesterol metabolism is regulated by the modulation of a group of genes, particularly with LYC supplementation.
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Affiliation(s)
- C Orhan
- Department of Animal Nutrition and Nutritional Diseases, Faculty of Veterinary Medicine, Firat University, Elazig, Turkey
| | - O Kucuk
- Department of Animal Nutrition and Nutritional Diseases, School of Veterinary Medicine, Erciyes University, Kayseri, Turkey
| | - N Sahin
- Department of Animal Nutrition and Nutritional Diseases, Faculty of Veterinary Medicine, Firat University, Elazig, Turkey
| | - M Tuzcu
- Department of Biology, Faculty of Science, Firat University, Elazig, Turkey
| | - K Sahin
- Department of Animal Nutrition and Nutritional Diseases, Faculty of Veterinary Medicine, Firat University, Elazig, Turkey
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Yao M, Li Z, Julian McClements D, Tang Z, Xiao H. Design of nanoemulsion-based delivery systems to enhance intestinal lymphatic transport of lipophilic food bioactives: Influence of oil type. Food Chem 2020; 317:126229. [PMID: 32078989 DOI: 10.1016/j.foodchem.2020.126229] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 01/08/2020] [Accepted: 01/15/2020] [Indexed: 01/07/2023]
Abstract
The impact of nanoemulsions containing triglycerides with different fatty acid chain lengths on the bioavailability of a highly lipophilic bioactive: 5-demethylnobiletin (5-DN) was investigated. 5-DN was encapsulated in nanoemulsions fabricated using either medium-chain triglycerides (MCT) or long-chain triglycerides (LCT). They were then subjected to in vitro digestion, and the resulting mixed micelles was applied to a Caco-2 cell model. Higher 5-DN bioaccessibility was found for the MCT-nanoemulsion (13%) than for the LCT-nanoemulsion (7%). However, only 30% 5-DN in MCT crossed the Caco-2 monolayer and 50% was metabolized, while 60% 5-DN in LCT crossed the monolayer and only 10% was metabolized. More lipid droplets and chylomicrons were also formed for the LCT nanoemulsions, indicating greater 5-DN transported through lymph. Although MCT gave a higher 5-DN bioaccessibility, the final amount of 5-DN absorbed and transported to the lymph was inferior to that of the LCT formulation.
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Affiliation(s)
- Mingfei Yao
- Department of Food Science, University of Massachusetts, Amherst, MA 01003, USA; State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou 310003, China
| | - Zhengze Li
- Department of Food Science, University of Massachusetts, Amherst, MA 01003, USA
| | | | - Zhonghai Tang
- School of Food Science and Technology, Hunan Agricultural University, Changsha, China
| | - Hang Xiao
- Department of Food Science, University of Massachusetts, Amherst, MA 01003, USA; School of Food Science and Technology, Hunan Agricultural University, Changsha, China.
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Selvaraj G, Kaliamurthi S, Cakmak ZE, Cakmak T. Computational screening of dipeptidyl peptidase IV inhibitors from micoroalgal metabolites by pharmacophore modeling and molecular docking. PHYCOLOGICAL RESEARCH 2016. [DOI: 10.1111/pre.12141] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Gurudeeban Selvaraj
- Department of Molecular Biology and Genetics, Faculty of Engineering and Natural Sciences; Istanbul Medeniyet University; Istanbul Turkey
| | - Satyavani Kaliamurthi
- Department of Molecular Biology and Genetics, Faculty of Engineering and Natural Sciences; Istanbul Medeniyet University; Istanbul Turkey
| | - Zeynep E. Cakmak
- Department of Molecular Biology and Genetics, Faculty of Engineering and Natural Sciences; Istanbul Medeniyet University; Istanbul Turkey
- Department of Biology, Faculty of Arts and Sciences; Kirikkale University; Kirikkale Turkey
| | - Turgay Cakmak
- Department of Molecular Biology and Genetics, Faculty of Engineering and Natural Sciences; Istanbul Medeniyet University; Istanbul Turkey
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Mumme K, Stonehouse W. Effects of medium-chain triglycerides on weight loss and body composition: a meta-analysis of randomized controlled trials. J Acad Nutr Diet 2015; 115:249-263. [PMID: 25636220 DOI: 10.1016/j.jand.2014.10.022] [Citation(s) in RCA: 100] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Accepted: 09/26/2014] [Indexed: 12/31/2022]
Abstract
BACKGROUND Medium-chain triglycerides (MCTs) may result in negative energy balance and weight loss through increased energy expenditure and lipid oxidation. However, results from human intervention studies investigating the weight reducing potential of MCTs, have been mixed. OBJECTIVE To conduct a systematic review and meta-analysis of randomized controlled trials comparing the effects of MCTs, specifically C8:0 and C10:0, to long-chain triglycerides (LCTs) on weight loss and body composition in adults. Changes in blood lipid levels were secondary outcomes. METHODS Randomized controlled trials >3 weeks' duration conducted in healthy adults were identified searching Web of Knowledge, Discover, PubMed, Scopus, New Zealand Science, and Cochrane CENTRAL until March 2014 with no language restriction. Identified trials were assessed for bias. Mean differences were pooled and analyzed using inverse variance models with fixed effects. Heterogeneity between studies was calculated using I(2) statistic. An I(2)>50% or P<0.10 indicated heterogeneity. RESULTS Thirteen trials (n=749) were identified. Compared with LCTs, MCTs decreased body weight (-0.51 kg [95% CI-0.80 to -0.23 kg]; P<0.001; I(2)=35%); waist circumference (-1.46 cm [95% CI -2.04 to -0.87 cm]; P<0.001; I(2)=0%), hip circumference (-0.79 cm [95% CI -1.27 to -0.30 cm]; P=0.002; I(2)=0%), total body fat (standard mean difference -0.39 [95% CI -0.57 to -0.22]; P<0.001; I(2)=0%), total subcutaneous fat (standard mean difference -0.46 [95% CI -0.64 to -0.27]; P<0.001; I(2)=20%), and visceral fat (standard mean difference -0.55 [95% CI -0.75 to -0.34]; P<0.001; I(2)=0%). No differences were seen in blood lipid levels. Many trials lacked sufficient information for a complete quality assessment, and commercial bias was detected. Although heterogeneity was absent, study designs varied with regard to duration, dose, and control of energy intake. CONCLUSIONS Replacement of LCTs with MCTs in the diet could potentially induce modest reductions in body weight and composition without adversely affecting lipid profiles. However, further research is required by independent research groups using large, well-designed studies to confirm the efficacy of MCT and to determine the dosage needed for the management of a healthy body weight and composition.
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Bueno NB, de Melo IV, Florêncio TT, Sawaya AL. Dietary medium-chain triacylglycerols versus long-chain triacylglycerols for body composition in adults: systematic review and meta-analysis of randomized controlled trials. J Am Coll Nutr 2015; 34:175-83. [PMID: 25651239 DOI: 10.1080/07315724.2013.879844] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
OBJECTIVE To assess the effect of replacing dietary long-chain triacylglycerols (LCTs) with medium-chain triacylglycerols (MCTs) on body composition in adults. METHODS We conducted a meta-analysis of randomized controlled trials (RCTs), to determine whether individuals assigned to replace at least 5 g of dietary LCTs with MCTs for a minimum of 4 weeks show positive modifications on body composition. We systematically searched, through July 2013, the CENTRAL, EMBASE, LILACS, and MEDLINE databases for RCTs that investigated the effects of MCT intake on body composition in adults. Two authors independently extracted data and assessed risk of bias. Weighted mean differences (WMDs) were calculated for net changes in the outcomes. We assessed heterogeneity by the Cochran Q test and I(2) statistic and publication bias with the Egger's test. Prespecified sensitivity analyses were performed. RESULTS In total, 11 trials were included, from which 5 presented low risk of bias. In the overall analysis, including all studies, individuals who replaced dietary LCT with MCT showed significantly reduced body weight (WMD, -0.69 kg; 95% confidence interval [CI], -1.1 to -0.28; p = 0.001); body fat (-0.89 kg; 95% CI, -1.27 to -0.51; p < 0.001), and WC (-1.78 cm; 95% CI, -2.4 to -1.1; p < 0.001). The overall quality of the evidence was low to moderate. Trials with a crossover design were responsible for the heterogeneity. CONCLUSION Despite statistically significant results, the recommendation to replace dietary LCTs with MCTs must be cautiously taken, because the available evidence is not of the highest quality.
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Affiliation(s)
- Nassib B Bueno
- a Laboratório de Fisiologia da Nutrição, Departamento de Nutrição, Universidade Federal de São Paulo , Sao Paulo , BRASIL
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Deng Q, Yu X, Xu J, Liu C, Huang F, Huang Q, Yang J. Effect of Flaxseed Oil Fortified with Vitamin E and Phytosterols on Antioxidant Defense Capacities and Lipids Profile in Rats. J Food Sci 2012; 77:H135-40. [DOI: 10.1111/j.1750-3841.2012.02745.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Zhao HL, Houweling AH, Vanstone CA, Jew S, Trautwein EA, Duchateau GS, Jones PJ. Action of Plant Sterol Intervention on Sterol Kinetics in Hypercholesterolemic Men with High versus Low Basal Circulatory Plant Sterol Concentrations. J Am Coll Nutr 2011; 30:155-65. [DOI: 10.1080/07315724.2011.10719955] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Liu X, Zhao H, Thiessen S, House J, Jones P. Effect of plant sterol-enriched diets on plasma and egg yolk cholesterol concentrations and cholesterol metabolism in laying hens. Poult Sci 2010; 89:270-5. [DOI: 10.3382/ps.2009-00249] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Nik Norulaini N, Setianto W, Zaidul I, Nawi A, Azizi C, Omar AM. Effects of supercritical carbon dioxide extraction parameters on virgin coconut oil yield and medium-chain triglyceride content. Food Chem 2009. [DOI: 10.1016/j.foodchem.2009.02.030] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Rudkowska I, AbuMweis SS, Nicolle C, Jones PJ. Association between non-responsiveness to plant sterol intervention and polymorphisms in cholesterol metabolism genes: a case-control study. Appl Physiol Nutr Metab 2008; 33:728-34. [DOI: 10.1139/h08-041] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Plant sterol (PS) consumption decreases low-density lipoprotein cholesterol (LDL-C) levels; however, high variability of responsiveness of lipid levels to PS intervention has been observed. We hypothesized that common single-nucleotide polymorphisms (SNPs) in the genes for the ATP binding cassette proteins G5 (ABCG5) and G8 (ABCG8), Niemann-Pick C1-like 1 (NPC1L1), or other proteins of the cholesterol pathway, would underline inter-individual variations in response to PS. Twenty-six hyperlipidemic subjects completed a randomized trial of 3 PS phases and a control phase. Three non-responders were identified who failed on 3 consecutive occasions to decrease either total cholesterol or LDL-C level vs. control. It was observed that after 3 PS phases compared with a control phase, cholesterol absorption changed to a lesser degree (–7.7% ± 10.8%) in the non-responders than in the top 3 responders (–22.1% ± 8.8%); however, cholesterol synthesis rates did not differ between sub-groups. No common polymorphisms in ABCG8, ABCG5, or NPC1L1 were demonstrated between the 3 top responders and the non-responders. Yet, 1 non-responsive subject did demonstrate a rare SNP in NPC1L1. Results indicate PS intake did not decrease cholesterol absorption rates to the same degree in certain subjects, possibly clarifying the inter-individual variability in the cholesterol-lowering effect; hence, this work should be expanded.
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Affiliation(s)
- Iwona Rudkowska
- School of Dietetics and Human Nutrition, Faculty of Agricultural and Environmental Sciences, McGill University, 21 111 Lakeshore Road, Ste-Anne-de-Bellevue, QC H9X 3V9, Canada
- Danone Research, Route Departementale 128, 91767 Palaiseau CEDEX, France
- Richardson Centre for Functional Foods and Nutraceuticals, 196 Innovation Drive, Winnipeg, MB R3T 6C5, Canada
| | - Suhad S. AbuMweis
- School of Dietetics and Human Nutrition, Faculty of Agricultural and Environmental Sciences, McGill University, 21 111 Lakeshore Road, Ste-Anne-de-Bellevue, QC H9X 3V9, Canada
- Danone Research, Route Departementale 128, 91767 Palaiseau CEDEX, France
- Richardson Centre for Functional Foods and Nutraceuticals, 196 Innovation Drive, Winnipeg, MB R3T 6C5, Canada
| | - Catherine Nicolle
- School of Dietetics and Human Nutrition, Faculty of Agricultural and Environmental Sciences, McGill University, 21 111 Lakeshore Road, Ste-Anne-de-Bellevue, QC H9X 3V9, Canada
- Danone Research, Route Departementale 128, 91767 Palaiseau CEDEX, France
- Richardson Centre for Functional Foods and Nutraceuticals, 196 Innovation Drive, Winnipeg, MB R3T 6C5, Canada
| | - Peter J.H. Jones
- School of Dietetics and Human Nutrition, Faculty of Agricultural and Environmental Sciences, McGill University, 21 111 Lakeshore Road, Ste-Anne-de-Bellevue, QC H9X 3V9, Canada
- Danone Research, Route Departementale 128, 91767 Palaiseau CEDEX, France
- Richardson Centre for Functional Foods and Nutraceuticals, 196 Innovation Drive, Winnipeg, MB R3T 6C5, Canada
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Roynette CE, Rudkowska I, Nakhasi DK, Jones PJH. Structured medium and long chain triglycerides show short-term increases in fat oxidation, but no changes in adiposity in men. Nutr Metab Cardiovasc Dis 2008; 18:298-305. [PMID: 17368874 DOI: 10.1016/j.numecd.2006.11.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2006] [Revised: 11/08/2006] [Accepted: 11/22/2006] [Indexed: 11/18/2022]
Abstract
BACKGROUND Medium chain triglycerides (MCT) have been suggested as modulators of human energy expenditure (EE) and thus may influence total and regional body fat distribution. OBJECTIVE To investigate in overweight men the effects of structured medium and long chain triglycerides on EE, substrate oxidation and body adiposity, compared to extra virgin olive oil (OO). METHODS In a 6 week single-blind crossover study, 23 overweight men were randomly assigned to consume a standard high-fat diet of which 75% total fat was provided as either structured medium and long chain triglycerides referred to as structured oil (StO), or OO. EE and body composition were measured using indirect calorimetry and magnetic resonance imaging, respectively, at weeks 1 and 6 of each phase. RESULTS Body weight decreased (p<0.01) from baseline to end-point during consumption of both the StO (-1.46+/-0.4k g) and OO (-1.17+/-0.4 kg); however, no significant treatment differences were observed. There were no changes in body composition among treatment groups. No differences between diets for EE measurements were reported. Fat oxidation rates did not differ between oils, but were reduced (p<0.05) in the StO group between baseline (0.0020+/-0.0003 g/kg fat free mass per min) in comparison to after week 6 (0.0013+/-0.0001 g/kg fat free mass per min). No differences in carbohydrate oxidation rate were noted across diets or time. CONCLUSION The present structured medium and long chain triglyceride oil increases short-term fat oxidation but fails to modulate body weight or adiposity through a change in EE.
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Affiliation(s)
- Catherine E Roynette
- School of Dietetics and Human Nutrition, Faculty of Agricultural and Environmental Sciences, McGill University, 21,111 Lakeshore Road, Ste-Anne-de-Bellevue, QC, Canada
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Jenkins DJA, Kendall CWC, Nguyen TH, Marchie A, Faulkner DA, Ireland C, Josse AR, Vidgen E, Trautwein EA, Lapsley KG, Holmes C, Josse RG, Leiter LA, Connelly PW, Singer W. Effect of plant sterols in combination with other cholesterol-lowering foods. Metabolism 2008; 57:130-9. [PMID: 18078870 DOI: 10.1016/j.metabol.2007.08.016] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2007] [Accepted: 08/31/2007] [Indexed: 11/28/2022]
Abstract
The National Cholesterol Education Program Adult Treatment Panel III guidelines advocate effective combinations of cholesterol-lowering dietary components. This approach (dietary portfolio) produces large reductions in serum cholesterol, but the contribution of individual components remains to be established. We therefore assessed the effect of eliminating one out of the 4 dietary portfolio components. Plant sterols were selected because at 2 g/d, they have been reported to reduce low-density lipoprotein cholesterol (LDL-C) by 9% to 14%. Forty-two hyperlipidemic subjects were prescribed diets high in soy protein (22.5 g/1000 kcal), viscous fibers (10 g/1000 kcal), and almonds (23 g/1000 kcal) for 80 weeks. Subjects were instructed to take these together with plant sterols (1.0 g/1000 kcal) except between weeks 52 and 62. While taking the full dietary portfolio, including plant sterols, mean LDL-C reduction from baseline was 15.4% +/- 1.6% (P < .001). After sterol elimination, mean LDL-C reduction was 9.0% +/- 1.5% (P < .001). Comparable LDL-C reductions were also seen for the 18 subjects with a complete data set: on plant sterols, 16.7% +/- 3.1% (P < .001) and off plant sterols, 10.3% +/- 2.6% (P < .001), resulting in a 6.3% +/- 2.0% (P = .005) difference attributable to plant sterols. Compliance in this group of 18 was 67.0% +/- 5.9% for plant sterols and 61.9% +/- 4.8% for the other components. In combination with other cholesterol-lowering foods and against the background of a low-saturated fat diet, plant sterols contributed over one third of the LDL-C reduction seen with the dietary portfolio after 1 year of following dietary advice.
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Affiliation(s)
- David J A Jenkins
- Clinical Nutrition and Risk Factor Modification Center, St Michael's Hospital, Toronto, Ontario, Canada M5C 2T2.
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Rodrigues JN, Torres RP, Mancini-Filho J, Gioielli LA. Physical and chemical properties of milkfat and phytosterol esters blends. Food Res Int 2007. [DOI: 10.1016/j.foodres.2007.01.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Rudkowska I, Jones PJH. Functional foods for the prevention and treatment of cardiovascular diseases: cholesterol and beyond. Expert Rev Cardiovasc Ther 2007; 5:477-90. [PMID: 17489672 DOI: 10.1586/14779072.5.3.477] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Cardiovascular disease (CVD) is a major cause of death and disability in many developed countries. The purpose of this literature review is to establish a recommendation for the intake of functional food ingredients in a healthy diet--such as plant sterols (PSs) in low-fat and functional matrices, fatty acid composition and other nutrients of tree nuts and flavonoids in dark chocolate--for the prevention and treatment of CVD. These three specific functional foods are explored in this review, since there is a higher potential for their increased consumption by the population to prevent CVD. First, PS have been added to various nontraditional matrices, such as low-fat products and functional oils, which have shown cholesterol-lowering effects in most clinical trials. Secondly, a growing number of clinical studies indicate that the beneficial effect of tree nuts may not only be due to their fatty acid composition but to other key nutrients, which may provide supplementary health benefits, such as endothelial cell function, as well as decreasing total cholesterol and low-density lipoprotein cholesterol (LDL-C). Lastly, flavonoids in dark chocolate may protect LDL-C particles from undergoing oxidative modification. However, some gaps in our knowledge need to be filled before firm recommendations can be made for habitual dark chocolate consumption. Overall, these functional foods should be considered as an addition to current lipid-lowering recommendations for improving CVD risk.
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Affiliation(s)
- Iwona Rudkowska
- School of Dietetics and Human Nutrition McGill University, St-Anne-de-Bellevue, Québec, Canada.
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