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Evidence-Based Supplement Research
Evidence-Based Supplement Research
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green tea and Reduced Body Mass Index

Research synthesisModerate evidenceSmall effect4 studies · 3 beneficial · 1 neutral · 0 harmful

Across 4 meta-analyses, 3 reported beneficial effects of green tea on reducing body mass index (BMI), with effect sizes ranging from small to large (predominantly small to moderate). The single neutral study focused on postmenopausal women and found no statistically significant effect. Most studies did not specify dose or duration, but the beneficial effects were observed in overweight and obese adult populations.

  • Studied populations: overweight and obese adults, postmenopausal women

Caveats: Available evidence is overwhelmingly positive — clinical literature in this area is subject to publication bias (null-result studies are less likely to be published or indexed). Evidence base is small (only 4 studies) — conclusions should be considered preliminary. Doses and study durations were not consistently reported, limiting dose-response and generalizability.

Generated Jul 15, 2026
4 of 4 papers
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