Safety · Supplement
Green Tea Extract (EGCG): side effects, safety & interactions
Brewed tea is safe. Concentrated extracts carry a rare hepatotoxicity risk; avoid high fasted doses.
- Overall grade
- Grade C
- Last revised
- 0
- graded outcomes
- 0
- references listed
Assembled by the app from other entries in this library. It adds no evidence of its own — follow the links to the entries it draws on.
The evidence in words
Safety profile
Brewed tea is safe. Concentrated extracts carry a rare hepatotoxicity risk; avoid high fasted doses.
Interactions to respect
No major interactions are on record for Green Tea Extract (EGCG) at typical doses, but tell your clinician about everything you take.
What Green Tea Extract (EGCG) is
Green tea extract concentrates catechins, chiefly EGCG, plus caffeine. Drinking green tea is benign and pleasant; high-dose concentrated extracts are a different risk profile.
The honest bottom line
Drink the tea for a pleasant, mild metabolic nudge. Be cautious with concentrated EGCG capsules — the weight-loss upside is small and the rare liver risk is not.
Related reading
Entries that share this one's tags or conditions.
- Cinnamon: side effects, safety & interactionsHigh-dose cassia coumarin can stress the liver; additive glucose lowering with diabetes drugs.Evidence grade C
- Alpha-Lipoic Acid: side effects, safety & interactionsGenerally safe; can lower glucose (watch for lows with diabetes meds) and rarely triggers an insulin-autoimmune reactionEvidence grade B
- Grape Seed Extract: side effects, safety & interactionsGenerally safe; mild antiplatelet action.Evidence grade C
- Green Tea Extract (EGCG)Modest metabolic and cardiovascular benefits from catechins — and a real, if uncommon, liver-toxicity signal at high concentrated doses.Evidence grade C
Sources
This entry lists no references of its own — it is assembled from the entries it links to, whose sources are on their pages.
Last revised . A grade is this entry's reading of the evidence, not medical advice.