Effects of dietary supplementation with epigallocatechin-3-gallate on weight loss, energy homeostasis, cardiometabolic risk factors and liver function in obese women: randomised, double-blind, placebo-controlled clinical trial.

Mielgo-Ayuso Juan, et al.
British Journal of Nutrition, 2014

Abstract

The aim of the present study was to examine the effects of green tea epigallocatechin-3-gallate (EGCG) on changes in body composition, energy and substrate metabolism, cardiometabolic risk factors and liver function enzymes after an energy-restricted diet intervention in obese women. In the present randomised, double-blind, placebo-controlled study, eighty-three obese (30 kg/m² > BMI < 40 kg/m²) pre-menopausal women consumed 300 mg/d of EGCG or placebo (lactose). We measured body weight and adiposity (dual-energy X-ray absorptiometry), energy expenditure and fat oxidation rates (indirect calorimetry), blood lipid levels (TAG, total cholesterol, LDL-cholesterol and HDL-cholesterol), insulin resistance, C-reactive protein and liver function markers (aspartate aminotransferase, alanine aminotransferase, alkaline phosphatase, γ-glutamyltransferase, urea, bilirubin and 2-keto[1-¹³C]isocaproate oxidation) before and after the intervention in the EGCG and control groups. We did not find any significant difference in the changes in body weight (-0.3 kg, 95% CI -5.0, 4.3), fat mass (-0.7 kg, 95% CI -3.5, 2.1), energy (0.3 kJ/kg per d, 95% CI -3.1, 2.7) and fat (-0.1 g/min, 95% CI -0.03, 0.01) metabolism, homeostasis assessment model for insulin resistance (0.2, 95% CI -0.2, 0.7), total cholesterol (-0.21 mmol/l, 95% CI -0.55, 0.13), LDL-cholesterol (-0.15 mmol/l, 95% CI -0.50, 0.20), TAG (-0.4 mmol/l, 95% CI -0.56, 0.29) and liver function markers between the EGCG and control groups. In conclusion, the present results suggest that dietary supplementation with 300 mg/d of EGCG for 12 weeks did not enhance energy-restricted diet-induced adiposity reductions, and did not improve weight-loss-induced changes in cardiometabolic risk factors in obese Caucasian women. The intake of 300 mg/d of EGCG for 12 weeks did not cause any adverse effect on liver function biomarkers.

PMID:24299662
DOI:10.1017/S0007114513003784
Category:Weight Loss

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