Green tea extract
A concentrated green tea extract is not equivalent to brewed tea. Catechin standardization, caffeine, amount, fasting use and medication context change risk and interpretation.
No FDA Daily Value, RDA, AI or UL for green tea extract
Caffeine has separate intake considerations; extract amount alone does not reveal catechin or caffeine exposure.
Compare nutrient-reference terminology →What the research can—and cannot—support
Safety and exposure differ between brewed tea and concentrated capsules or liquids.
Small changes in selected biomarkers do not establish broad weight-loss or disease-prevention claims.
Uncommon liver injury has been reported primarily with extract products.
Fields to verify on a real product
A familiar ingredient name is not enough to match a study or judge transparency.
Camellia sinensis material and extraction
Total extract and catechin/EGCG standardization
Caffeine per serving
Warnings and independent contaminant testing
Important reasons to pause
General information only. Suitability depends on the exact product, amount, health context and medication list.
- Extracts can cause nausea, abdominal discomfort and increased blood pressure.
- Liver injury, though uncommon, is a material warning signal.
- Interactions with nadolol, atorvastatin, raloxifene and other medicines have been reported.
Where this ingredient appears in reviewed formulas
A label appearance does not transfer this ingredient evidence to the finished product. No affiliate link appears in this section.
Primary and evidence-synthesis sources
- NCCIH: Green TeaBeverage/extract distinction, liver signal, caffeine and interactions.