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Moderate· well-documented
May be possible under supervision — talk to your prescriber or pharmacist before combining.
Green tea polyphenols can reduce iron absorption by up to 64%, potentially worsening iron deficiency.
Catechins and tannins chelate non-heme iron in the gut, forming insoluble complexes that cannot be absorbed.
Source: Clinical Studies · Reviewed April 2026
Green Tea + Iron supplements: use caution. May be possible under supervision — talk to your prescriber or pharmacist before combining. Green tea polyphenols can reduce iron absorption by up to 64%, potentially worsening iron deficiency.
Catechins and tannins chelate non-heme iron in the gut, forming insoluble complexes that cannot be absorbed.
Do not stop either abruptly on your own. Talk to your prescriber or pharmacist promptly — bring this page to your appointment.
Educational information only — not medical advice. Always verify with a healthcare professional.