Fertility Decoded

Green tea extract (EGCG)

Written by Fertility Decoded. Reviewed by D R, MS (OBG), FRM. Review date: 31 August 2026.

The verdict

No fertility-specific evidence found for this item at all; separately, concentrated green tea extract is one of the best-documented, occasionally fatal causes of drug-induced liver injury among all dietary supplements — this is a distinct and serious safety concern independent of any fertility claim.

A concentrated antioxidant supplement (distinct from drinking brewed green tea), marketed broadly as a general-health/fertility antioxidant.

What the evidence shows

This research pass found no dedicated fertility evidence base for green tea extract at all — it's included here because it's a commonly stacked "antioxidant" in general fertility-supplement blends, not because of any specific fertility claim with evidence behind it.

Evidence tier

Documented harm

⛔ Peer-reviewed evidence of serious adverse effects from the item's own chemistry/pharmacology or a well-characterized allergic mechanism. More serious than contamination; not resolved by buying a 'reputable brand'.

Frequently asked questions

Does green tea extract help fertility?
No fertility-specific evidence was found — it's included because it's a common 'antioxidant' in blends.
Is green tea extract safe?
Concentrated extract (not brewed tea) is a well-documented cause of liver injury — 50+ cases, fatal in ~9%, across a wide dose range and linked to a genetic marker. Brewed green tea is a different matter.

Sources

Take this further

Sources last reviewed .