EGCG — answers to epigallocatechin gallate, a green tea catechin
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The most abundant catechin (a type of polyphenol) found in green tea, often extracted and concentrated for use in supplements.
Why it’s used
Taken for antioxidant support and sometimes for weight management or general metabolic support.
What the evidence is for
modest effects on weight or metabolic markers.
What the evidence says
Clinical trials on EGCG or green tea extract for weight or metabolic outcomes show mixed and generally modest results, and reviews describe the evidence as inconsistent. Regulatory bodies including EFSA have specifically reviewed high-dose EGCG supplements and noted a lack of consistent benefit alongside concerns about liver effects at higher intakes, which is a separate safety question from the efficacy evidence.
Dose studied
300–800 mg — range used across EGCG metabolic trials.
Context
Trials examining EGCG for metabolic outcomes have used doses ranging widely, often from about 300 to 800 milligrams per day, over periods of several weeks to months, with inconsistent results across studies.
Educational information, not medical or safety advice. Consult a professional for allergies or medical concerns.