Hi green tea is effective for weight loss in obese Thai's so one would expect it to be effective for any other obese group as well, it doesn't show any racial discrimination.

Effectiveness of green tea on weight reduction in obese Thais: A randomized, controlled trial.
Auvichayapat P, Prapochanung M, Tunkamnerdthai O, Sripanidkulchai BO, Auvichayapat N, Thinkhamrop B, Kunhasura S, Wongpratoom S, Sinawat S, Hongprapas P.

Department of Physiology, Faculty of Medicine, Khon Kaen University, 40002, Thailand. aparad@kku.ac.th <aparad@kku.ac.th>

This study was undertaken to investigate the effects of green tea on weight reduction in obese Thais. A randomized, controlled trial involving 60 obese subjects (body mass index, BMI > 25 kg/m2) was conducted. All subjects consumed a Thai diet containing 3 meals (8373.6 kJ/day) for 12 weeks, prepared by the Nutritional Unit at Srinagarind Hospital. The diet contained 65% carbohydrates, 15% protein, and 20% fat. Body weight, BMI, body composition, resting energy expenditure, and substrate oxidation were measured at baseline, and during weeks 4, 8, and 12 of the study. Serum levels of leptin and urine VMA were measured at baseline and during the 12th week. Differences over time and between the treatments (green tea or placebo) over time were determined using two-factor ANOVA with repeated measures. In comparing the two groups, differences in weight loss were 2.70, 5.10, and 3.3 kg during the 4th, 8th, and 12th weeks of the study, respectively. At the 8th and 12th weeks of the study, body weight loss was significantly different (P < 0.05). At the 8th week, the difference in resting energy expenditure was 183.38 kJ/day (P < 0.001), the difference in the respiratory quotient was 0.02 (P < 0.05), and no significant differences existed in satiety score, food intake, or physical activity. Urine VMA was significantly different in the 12th week of the study (P < 0.05). We conclude that green tea can reduce body weight in obese Thai subjects by increasing energy expenditure and fat oxidation.

PMID: 18006026 [PubMed - indexed for MEDLINE

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Green tea is very much effective in losing weight.It consists of the antioxidants that can help remove fat from your body and thereby you shed those extra pounds.

Hi YeastInfection,

You sound very confident in your interpretation of evidence for efficacy of treatment, eg "green tea is very much effective in losing weight". Have a look at this study.

Am J Clin Nutr 89: 822-830, 2009. First published January 28, 2009; doi:10.3945/ajcn.2008.27043
American Journal of Clinical Nutrition, doi:10.3945/ajcn.2008.27043
Vol. 89, No. 3, 822-830, March 2009

© 2009 American Society for Clinical Nutrition

ORIGINAL RESEARCH COMMUNICATION

Green tea catechin plus caffeine supplementation to a high-protein diet has no additional effect on body weight maintenance after weight loss

Rick Hursel1,2,3 and Margriet S Westerterp-Plantenga1,2,3

1 From the Maastricht University, Maastricht, Netherlands.

2 Supported by NUTRIM, Maastricht University, Maastricht, Netherlands.

3 Reprints not available. Address correspondence to R Hursel, Department of Human Biology, Maastricht University, PO Box 616, NL-6200 MD Maastricht, Netherlands. E-mail: rick.hursel@hb.unimaas.nl.


Background: Green tea (epigallocatechin gallate + caffeine) and protein each were shown to improve body weight maintenance after weight loss.

Objective: We investigated the effect of a green tea–caffeine mixture added to a high-protein (HP) diet on weight maintenance (WM) after body weight loss in moderately obese subjects.

Design: A randomized, placebo-controlled, double-blind parallel trial was conducted in 80 overweight and moderately obese subjects [age (mean ± SD): 44 ± 2 y; body mass index (BMI; in kg/m2): 29.6 ± 2.0] matched for sex, age, BMI, height, body mass, and with a habitually low caffeine intake. A very-low-energy diet intervention during 4 wk was followed by 3 mo of WM; during the WM period, the subjects received a green tea–caffeine mixture (270 mg epigallocatechin gallate + 150 mg caffeine/d) or placebo, both in addition to an adequate protein (AP) diet (50–60 g protein/d) or an HP diet (100–120 g protein/d).

Results: Subjects lost 7.0 ± 1.6 kg, or 8.2 ± 2.0%, body weight (P < 0.001). During the WM phase, WM, resting energy expenditure, and fat-free mass (FFM) increased relatively in both the HP groups and in the AP + green tea–caffeine mixture group (P < 0.05), whereas respiratory quotient and body fat mass decreased, all compared with the AP + placebo group. Satiety increased only in both HP groups (P < 0.05). The green tea–caffeine mixture was only effective with the AP diet.

Conclusion: The green tea–caffeine mixture, as well as the HP diet, improved WM independently through thermogenesis, fat oxidation, sparing FFM, and, for the HP diet, satiety; a possible synergistic effect failed to appear.


If I was involved in the discussion of this paper I would point out a possible confounding bias in the paper because of it's design : Design: A randomized, placebo-controlled, double-blind parallel trial

With parallel designs you are not using the same people as you would in a cross over trial, and so biochemical individuality may bias the result, in my opinion, what do you think YeastInfection ?


Cheers

Green tea is the best plus it works as an antioxidant.Green tea is better for you. As to weight lost, if you only depend on the tea, neither one will work. If you are watching your diet and exercising regularly, its best to drink the healthier one, which would be the green tea.

Hi LEE786,
That's pretty much how I see it as well, when trying to lose weight you must be totally committed or you risk failure.

Cheers