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Does green tea catechin enhance weight-loss effect of exercise training in overweight and obese individuals? A systematic review and meta-analysis
Meta-analysis of 10 RCTs in adults with overweight/obesity: green tea catechins plus exercise training produced small additional reductions in weight, BMI, and fat mass versus exercise with placebo (low/zero heterogeneity); no consistent incremental benefit on blood lipids.
Design
- SR + MA; 10 RCTs (24 full-text reviews from 1015 hits)
- Population: overweight/obesity
- Contrast: exercise + green tea vs exercise + placebo
Body composition (random-effects SMD [95% CI]; abstract)
- Weight: SMD −0.30 (−0.53 to −0.07)
- BMI: SMD −0.33 (−0.64 to −0.02)
- Fat mass: SMD −0.29 (−0.57 to −0.01)
- Authors report low/no heterogeneity across trials for these endpoints
Lipids
Abstract: no clear incremental benefit of co-ingestion on TG / LDL / HDL / TC versus exercise alone (wide CIs crossing null in reported ranges).
Evidence hygiene
Small additive effects on body comp—do not oversell as a lipid strategy independent of diet quality and training load.
Publication
Gholami F, et al. J Int Soc Sports Nutr. 2024 Dec 10;21(1):2448460. doi: 10.1080/15502783.2024.2448460. PMID 39350601.
Outcomes
- Effect Size (Cohen's d / SMD)-0.3d (Cohen's d)
- Effect Size (Cohen's d / SMD)-0.29d (Cohen's d)