Green tea for weight loss in women with overweight/obesity Original paper

    In this meta-analysis of randomized controlled trials conducted in women with overweight/obesity, supplementation with green tea reduced body weight, BMI, and waist circumference; the effects on body weight and BMI were apparent with daily green tea doses of 1000 mg or more.

    This Study Summary was published on August 23, 2023.

    Quick Summary

    In this meta-analysis of randomized controlled trials conducted in women with overweight/obesity, supplementation with green tea reduced body weight, BMI, and waist circumference; the effects on body weight and BMI were apparent with daily green tea doses of 1000 mg or more.

    What was studied?

    The effect of supplementation with green tea, compared to placebo, on body weight, BMI, and waist circumference in the context of overweight and obesity.

    Who was studied?

    Adult women (average ages of 22–62 years) with overweight/obesity (average baseline BMI of 25–45).

    How was it studied?

    A meta-analysis of 15 randomized controlled trials was performed. The trials were conducted in Iran (8 trials), Brazil (2 trials), the United States (1 trial), Malaysia (1 trial), China (1 trial), Taiwan (1 trial), and the Netherlands (1 trial). The intervention was green tea tablets/capsules (5 trials), green tea extract capsules (7 trials), and green tea drinks (3 trials). The intervention duration ranged from 25 days to 5 months.

    What were the results?

    Supplementation with green tea reduced body weight (−1.2 kg), BMI (−0.48), and waist circumference (−3.5 cm). In nonlinear dose-response analyses, supplementation with 1000 mg/day or more of green tea reduced body weight and BMI.

    The risk of bias was low in 11 trials, unclear in 2 trials, and high in 2 trials.

    This Study Summary was published on August 23, 2023.