Human evidence for concentrated green tea extract and EGCG is still mixed. The clearest public signal is modest help with body weight or waist-related measures, but that does not prove meaningful fat loss. Cholesterol, blood pressure, blood sugar, and liver-marker findings remain too inconsistent or too thin for stronger benefit claims, while high-dose EGCG warrants extra liver-safety caution.
Each row is a different health effect. A means the support looks strongest, B likely helpful, C mixed or modest, and — not enough human evidence yet.
Papers are individual studies. Research reviews summarize evidence from multiple studies, such as systematic reviews and meta-analyses.
Safety is graded separately from benefits. Even with a favorable safety label, these notes still matter if you take medication, are pregnant, or have a medical condition.
Dose, form and timing based on trials in the database.
Products that pass third-party quality testing.
Grades come from 34 unique research papers indexed from PubMed — including 12 review-level papers and 19 randomized trials. Each supplement is graded by health effect using a certainty × effect matrix applied across PubMed evidence per health effect. Cochrane reviews and high-quality systematic reviews carry the most weight. From abstract-only data, "high certainty" is rare — most A grades come from moderate certainty plus consistent meaningful-positive evidence. See Methodology for full detail.