Research synthesisModerate evidenceSmall effect4 studies · 3 beneficial · 1 neutral · 0 harmful
Across 4 studies, 3 reported beneficial effects of green tea on reduced body weight, with effect sizes ranging from small to moderate. One meta-analysis found a small but significant weight reduction (−0.74 kg), while another showed a small added benefit when combined with exercise (SMD = −0.30). The strongest evidence comes from a large systematic review (n=4572) in adults with MASLD, reporting moderate beneficial effects. No consistent dose or form data were available, and study durations were not uniformly reported.
- Studied populations: adults with metabolic dysfunction-associated steatotic liver disease (MASLD); overweight and obese individuals; postmenopausal women (no significant effect)
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). One meta-analysis in postmenopausal women found no statistically significant effect, suggesting the benefit may not generalize to all populations. Doses and forms were not consistently reported across studies, limiting the ability to recommend specific intake parameters.
Generated Jun 15, 2026