Hostname: page-component-586b7cd67f-2brh9 Total loading time: 0 Render date: 2024-11-26T15:02:20.578Z Has data issue: false hasContentIssue false
  • English
  • Français

Effects of encapsulated green tea and Guarana extracts containing a mixture of epigallocatechin-3-gallate and caffeine on 24 h energy expenditure and fat oxidation in men

Published online by Cambridge University Press:  08 March 2007

Sonia Bérubé-Parent ,
Catherine Pelletier ,
Jean Doré  and
Angelo Tremblay
Sonia Bérubé-Parent
Affiliation:
Division of Kinesiology, Laval University, Ste-Foy, Québec, Canada, G1K 7P4
Catherine Pelletier
Affiliation:
Division of Kinesiology, Laval University, Ste-Foy, Québec, Canada, G1K 7P4
Jean Doré
Affiliation:
Division of Kinesiology, Laval University, Ste-Foy, Québec, Canada, G1K 7P4
Angelo Tremblay*
Affiliation:
Division of Kinesiology, Laval University, Ste-Foy, Québec, Canada, G1K 7P4
*
*Corresponding author: Dr Angelo Tremblay, fax +1 418 656 3044, email [email protected]
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

It has been reported that green tea has a thermogenic effect, due to its caffeine content and probably also to the catechin, epigallocatechin-3-gallate (EGCG). The main aim of the present study was to compare the effect of a mixture of green tea and Guarana extracts containing a fixed dose of caffeine and variable doses of EGCG on 24 h energy expenditure and fat oxidation. Fourteen subjects took part to this randomized, placebo-controlled, double-blind, cross-over study. Each subject was tested five times in a metabolic chamber to measure 24 h energy expenditure, substrate oxidation and blood pressure. During each stay, the subjects ingested a capsule of placebo or capsules containing 200 mg caffeine and a variable dose of EGCG (90, 200, 300 or 400 mg) three times daily, 30 min before standardized meals. Twenty-four hour energy expenditure increased significantly by about 750 kJ with all EGCG–caffeine mixtures compared with placebo. No effect of the EGCG–caffeine mixture was observed for lipid oxidation. Systolic and diastolic blood pressure increased by about 7 and 5 mmHg, respectively, with the EGCG–caffeine mixtures compared with placebo. This increase was significant only for 24 h diastolic blood pressure. The main finding of the study was the increase in 24 h energy expenditure with the EGCG–caffeine mixtures. However, this increase was similar with all doses of EGCG in the mixtures.

Keywords

Green teaBody weightEnergy balance
Type
Research Article
Information
British Journal of Nutrition , Volume 94 , Issue 3 , September 2005 , pp. 432 - 436
Copyright
Copyright © The Nutrition Society 2005

References

Astrup, A, Toubro, S, Cannon, S, Hein, P, Breum, L & Madsen, J (1990) Caffeine: a double-blind, placebo-controlled study of its thermogenic, metabolic, and cardiovascular effects in healthy volunteers. Am J Clin Nutr 51, 759–767.CrossRefGoogle ScholarPubMed
Behnke, AR & Wilmore, JH (1974) Evaluation and Regulation of Body Build and Composition, pp. 20–37. Englewood Cliffs, NJ: Prentice-Hall.Google Scholar
Bérubé-Parent, S, St-Pierre, S, Prud'homme, D, Doucet, E & Tremblay, A (2001) Obesity treatment with a progressive clinical tri-therapy combining sibutramine and a supervised diet–exercise intervention. Int J Obesity Relat Metab Disord 25, 1144–1153.CrossRefGoogle Scholar
Dulloo, AG, Geissler, CA, Horton, T, Collins, A & Miller, DS (1989) Normal caffeine consumption: influence on thermogenesis and daily energy expenditure in lean and postobese human volunteers. Am J Clin Nutr 49, 44–50.CrossRefGoogle ScholarPubMed
Dulloo, A, Duret, C, Girardier, L, Mensi, N, Fathi, M, Chantre, P & Vandermander, J (1999) Efficacy of a green tea extract rich in catechin polyphenols and caffeine in increasing 24-h energy expenditure and fat oxidation in humans. Am J Clin Nutr 70, 1040–1045.CrossRefGoogle Scholar
Dulloo, A, Seydoux, J, Girardier, L, Chantre, P & Vandermander, J (2000) Green tea and thermogenesis: interactions between catechin-polyphenols, caffeine and sympathetic activity. Int J Obesity Relat Metab Disord 24, 252–258.CrossRefGoogle ScholarPubMed
Dufresne, CJ & Farnworth, ER (2001) A review of latest research findings on the health promotion properties of tea. J Nutr Biochem 12, 404–421.CrossRefGoogle ScholarPubMed
Frayn, K (1983) Calculation of substrate oxidation rates in vivo from gaseous exchange. J Appl Physiol 55, 628–634.CrossRefGoogle ScholarPubMed
Harrison, GG, Buskirk, ER, Carter, JEL, Johnston, FE, Lohman, TG, Pollock, ML, Roche, AF & Wilnore, J (1988) Stinford thickness and measurement Technique. In Anthropometric Standardization Reference Manual, pp. 55–80 [Lohman, TG, Roche, AF and Martorell, R, editors]. Champaign, IL: Human Kinetics Books.Google Scholar
Kovacs, EM, Lejeune, MP, Nijs, I, Westerterp-Plantenga, MS (2004) Effects of green tea on weight maintenance after body-weight loss. Br J Nutr 91, 431–437.CrossRefGoogle ScholarPubMed
McArdle, WD, Katch, FI & Katch, VL (1996) Functional capacity of the cardiovascular system. In Exercise Physiology, 4th ed., 296–312 [Ballado, D, editor]. Baltimore, MD: William and Wilkins.Google Scholar
Meneely, EA & Kaltreider, NL (1949) Volume of the lung determined by helium dilution. J Clin Invest 28, 129–139.CrossRefGoogle ScholarPubMed
Seals, DR & Hagberg, JM (1984) The effect of exercise training on human hypertension. Med Sci Sports Exerc 16, 207–215.CrossRefGoogle ScholarPubMed
Siri, WE (1956) The gross composition of the body. Adv Biol Med Physiol 4, 238–280.Google ScholarPubMed
Talwar, D, Williamson, C, McLaughlin, A, Gill, A & O'Reilly, DS (2002) Extraction and separation of urinary catecholamines as their diphenyl boronate complexes using C 18 solid-phase extraction sorbent and high-performance liquid chromatography. J Chromatogr B Analyt Technol Biomed Life Sci 769, 341–349.CrossRefGoogle Scholar
Weir, JB (1949) New method for calculating metabolic rate with special references to protein metabolism. J Physiol (Lond) 109, 1–9.CrossRefGoogle ScholarPubMed
White, MD, Bouchard, G, Buemann, B, Almeras, N, Despres, JP, Bouchard, C & Tremblay, A (1996) Reproducibility of 24-h energy expenditure and macronutrient oxidation rates in an indirect calorimeter. J Appl Physiol 80, 133–139.CrossRefGoogle Scholar
White, MD, Bouchard, G, Bueman, B, Despres, JP, Bouchard, C & Tremblay, A (1997) Energy and macronutrient balances for humans in a whole body metabolic chamber without control of preceding diet and activity level. Int J Obes Relat Metab Disord 21, 135–140.CrossRefGoogle Scholar
Yang, C & Landau, J (2000) Effects of tea consumption on nutrition and health. J Nutr 130, 2409–2412.CrossRefGoogle ScholarPubMed