Green Tea for Weight Management

Research suggests that green tea catechins — particularly when combined with caffeine — may support weight management by increasing energy expenditure, promoting fat oxidation, and helping preserve lean body mass, with several reviews noting potential benefits during the weight-maintenance phase following caloric restriction. The available evidence comes primarily from narrative reviews and mechanistic analyses rather than large-scale randomized controlled trials, and while the general direction of this literature is cautiously supportive, a 2023 review examining green tea supplementation alongside exercise found the combined effects on body composition to be inconclusive, and a separate review of catechins alongside other bioactives similarly noted frequent contradictions across studies. Studies indicate that individual factors — including genetic variation in the COMT enzyme, habitual caffeine intake, ethnicity, and dietary protein consumption — may meaningfully influence how effective these compounds are for any given person, complicating efforts to draw universal conclusions. Across the body of literature, authors consistently call for more standardized, rigorous clinical research before green tea catechins can be broadly recommended as a reliable strategy for weight management.