Green Tea Extract (EGCG)
Commonly used for
InflammationHealthy AgingHeart HealthMetabolic Health
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What is it? / Overview
Green tea extract contains catechins particularly EGCG which have antioxidant and modest cardiometabolic benefits. High-dose extracts have been associated with rare cases of liver injury making appropriate dosing important.
How is it used? / Administration
Form: Decaffeinated EGCG-standardized extract
Typical dose studied: 250–500 mg EGCG/day
Timing: With food — never on empty stomach
Always take with food. Avoid products providing very high EGCG doses (> 800 mg/day).
How well does it work? / Evidence
~ Moderate evidence
Who should avoid it?
Avoid with: End-stage liver disease / Cirrhosis; NAFLD / MASLD — Fatty liver disease
Interacts with: Warfarin; Stimulants if caffeinated product
Already taking it? Avoid high-dose extracts on an empty stomach.
Research & references
EFSA Scientific Opinion on Green Tea Catechins. Hodgson JM et al. Green tea and cardiovascular health. Cochrane Reviews on green tea.
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