This meta-analysis from 2012 reviewed 15 randomised, placebo-controlled clinical trials for weight loss and three studies for weight maintenance, in which various preparations of green tea beverages or controls were given to participants. A total of 1945 participants completed the studies, which ranged from 12 to 13 weeks. The results show reductions in measurements of weight loss, including body mass index and waist circumference
References:
Jurgens, T. M., Whelan, A. M., Killian, L., Doucette, S., Kirk, S., & Foy, E. (2012). Green tea for weight loss and weight maintenance in overweight or obese adults. The Cochrane database of systematic reviews, 12(12), CD008650. https://doi.org/10.1002/14651858.CD008650.pub2
