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Metabolic effects of green tea and of phases of weight loss.
Physiol Behav. 2006 Jan 30; 87(1):185-91.PB

Abstract

The effect of ingestion of green tea (GT) extract along with a low-energy diet (LED) on health-related blood parameters, and the relationships among changes in metabolic parameters and phases of weight loss were assessed. A double-blind, placebo-controlled, parallel design was used. 46 female subjects (BMI 27.7+/-1.8 kg/m(2)) were fed in energy balance from days 1 to 3, followed by a LED with GT (n=23) or placebo (PLAC, n=23) from days 4 to 87. The LED-period consisted of a phase 1 of 4 weeks (days 4-32) followed by a phase 2 of 8 weeks (days 32-87). Body composition and fasting blood samples were determined on days 4, 32 and 87. No significant differences were observed between the blood parameters of the PLAC and GT group. In phase 1 compared to phase 2 the rate of weight loss was 0.09+/-0.05 kg/day vs. 0.03+/-0.03 kg/day (p<0.001); Fat free mass (FFM) was 21% of weight loss in phase 1 vs. 7% in phase 2 (ns). Surprisingly, favourable changes in free fatty acids, triacylglycerol, beta-hydroxybutyrate, glucose and total cholesterol in phase 1 were reversed in phase 2 (p<0.01). Taken together, GT supplementation during a LED had no effect on health-related blood parameters. Initial improvements in several blood measures at day 32 were reversed by day 87, despite continued weight loss. Modest weight loss improved HDL cholesterol and blood pressure.

Authors+Show Affiliations

Maastricht University, Department of Human Biology, P.O. Box 616 NL-6200 MD, Maastricht, The Netherlands. K.Diepvens@HB.Unimaas.NLNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Randomized Controlled Trial
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

16277999

Citation

Diepvens, K, et al. "Metabolic Effects of Green Tea and of Phases of Weight Loss." Physiology & Behavior, vol. 87, no. 1, 2006, pp. 185-91.
Diepvens K, Kovacs EM, Vogels N, et al. Metabolic effects of green tea and of phases of weight loss. Physiol Behav. 2006;87(1):185-91.
Diepvens, K., Kovacs, E. M., Vogels, N., & Westerterp-Plantenga, M. S. (2006). Metabolic effects of green tea and of phases of weight loss. Physiology & Behavior, 87(1), 185-91.
Diepvens K, et al. Metabolic Effects of Green Tea and of Phases of Weight Loss. Physiol Behav. 2006 Jan 30;87(1):185-91. PubMed PMID: 16277999.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Metabolic effects of green tea and of phases of weight loss. AU - Diepvens,K, AU - Kovacs,E M R, AU - Vogels,N, AU - Westerterp-Plantenga,M S, Y1 - 2005/11/07/ PY - 2005/08/03/received PY - 2005/09/26/revised PY - 2005/09/29/accepted PY - 2005/11/10/pubmed PY - 2006/3/10/medline PY - 2005/11/10/entrez SP - 185 EP - 91 JF - Physiology & behavior JO - Physiol. Behav. VL - 87 IS - 1 N2 - The effect of ingestion of green tea (GT) extract along with a low-energy diet (LED) on health-related blood parameters, and the relationships among changes in metabolic parameters and phases of weight loss were assessed. A double-blind, placebo-controlled, parallel design was used. 46 female subjects (BMI 27.7+/-1.8 kg/m(2)) were fed in energy balance from days 1 to 3, followed by a LED with GT (n=23) or placebo (PLAC, n=23) from days 4 to 87. The LED-period consisted of a phase 1 of 4 weeks (days 4-32) followed by a phase 2 of 8 weeks (days 32-87). Body composition and fasting blood samples were determined on days 4, 32 and 87. No significant differences were observed between the blood parameters of the PLAC and GT group. In phase 1 compared to phase 2 the rate of weight loss was 0.09+/-0.05 kg/day vs. 0.03+/-0.03 kg/day (p<0.001); Fat free mass (FFM) was 21% of weight loss in phase 1 vs. 7% in phase 2 (ns). Surprisingly, favourable changes in free fatty acids, triacylglycerol, beta-hydroxybutyrate, glucose and total cholesterol in phase 1 were reversed in phase 2 (p<0.01). Taken together, GT supplementation during a LED had no effect on health-related blood parameters. Initial improvements in several blood measures at day 32 were reversed by day 87, despite continued weight loss. Modest weight loss improved HDL cholesterol and blood pressure. SN - 0031-9384 UR - https://www.unboundmedicine.com/medline/citation/16277999/Metabolic_effects_of_green_tea_and_of_phases_of_weight_loss_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0031-9384(05)00448-8 DB - PRIME DP - Unbound Medicine ER -