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The effects of catechin rich teas and caffeine on energy expenditure and fat oxidation: a meta-analysis

  • Hursel, R. Department of Human Biology, Nutrition and Toxicology Research Institute Maastricht (NUTRIM), Maastricht University, The Netherlands
  • Viechtbauer, W. Department of Methodology and Statistics, Maastricht University, The Netherlands
  • Dulloo, Abdul G. Department of Medicine/Physiology, University of Fribourg, Switzerland
  • Tremblay, A. Division of Kinesiology, Laval University, Quebec, Canada
  • Tappy, L. Department of Physiology, Lausanne University, Switzerland
  • Rumpler, W. Beltsville Human Nutrition Research Center, Beltsville, MD, USA
  • Westerterp-Plantenga, M. S. Department of Human Biology, Nutrition and Toxicology Research Institute Maastricht (NUTRIM), Maastricht University, The Netherlands
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    02.03.2011
Published in:
  • Obesity Reviews. - 2011, vol. 12, no. 7, p. e573–e581
Caffeine
catechins
green tea
oolong tea
English Different outcomes of the effect of catechin-caffeine mixtures and caffeine-only supplementation on energy expenditure and fat oxidation have been reported in short-term studies. Therefore, a meta-analysis was conducted to elucidate whether catechin-caffeine mixtures and caffeine-only supplementation indeed increase thermogenesis and fat oxidation. First, English-language studies measuring daily energy expenditure and fat oxidation by means of respiration chambers after catechin-caffeine mixtures and caffeine-only supplementation were identified through PubMed. Six articles encompassing a total of 18 different conditions fitted the inclusion criteria. Second, results were aggregated using random/mixed-effects models and expressed in terms of the mean difference in 24 h energy expenditure and fat oxidation between the treatment and placebo conditions. Finally, the influence of moderators such as BMI and dosage on the results was examined as well. The catechin-caffeine mixtures and caffeine-only supplementation increased energy expenditure significantly over 24 h (428.0 kJ (4.7%); P < 0.001 and 429.1 kJ (4.8%); P < 0.001, respectively). However, 24 h fat oxidation was only increased by catechin-caffeine mixtures (12.2 g (16.0%); P < 0.02 and 9.5 g (12.4%); P = 0.11, respectively). A dose-response effect on 24 h energy expenditure and fat oxidation occurred with a mean increase of 0.53 kJ mg⁻¹ (P < 0.01) and 0.02 g mg⁻¹ (P < 0.05) for catechin-caffeine mixtures and 0.44 kJ mg⁻¹ (P < 0.001) and 0.01 g mg⁻¹ (P < 0.05) for caffeine-only. In conclusion, catechin-caffeine mixtures or a caffeine-only supplementation stimulates daily energy expenditure dose-dependently by 0.4–0.5 kJ mg⁻¹ administered. Compared with placebo, daily fat-oxidation was only significantly increased after catechin-caffeine mixtures ingestion.
Faculty
Faculté des sciences et de médecine
Department
Département de Médecine
Language
  • English
Classification
Dietetics, nutrition
License
License undefined
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/302074
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