MODERATE — Monitor Closely
🟡 CAUTION — Green tea tannins and EGCG chelate non-heme iron, reducing absorption by 60-90%. Separate iron supplements from green tea by at least 2 hours.
Evidence level: STRONG
Green tea significantly blocks iron absorption. If you are iron-deficient or taking iron supplements, do not drink green tea within 1-2 hours of your iron dose.
Tannins and polyphenols in green tea (especially EGCG) chelate non-heme iron in the GI tract, reducing absorption by 60-90%. This applies to both supplemental and dietary iron.
Separate green tea and iron supplements by at least 2 hours. Vitamin C taken with iron can partially counteract the tannin effect. This is especially important for people with iron deficiency anemia.
Many foods affect iron absorption significantly. Green Tea — if it's high in tannins (tea, coffee, chocolate), phytates (whole grains, legumes), or calcium (dairy), space it 2+ hours from your iron supplement. Citrus fruits and bell peppers (vitamin C-rich) enhance iron uptake — pair them together.
Risk may increase with: kidney disease (impaired mineral clearance), high-dose supplementation, concurrent use of multiple mineral supplements, dehydration, or electrolyte imbalances.
Fatigue, pale skin, shortness of breath, brittle nails — signs that iron supplementation may not be working effectively.
No urgent need to discuss, but always keep your doctor informed of your full supplement and medication list. An up-to-date list helps them make the best treatment decisions.
Adjust the timing or quantity of Green Tea relative to your medication. Maintain consistent daily intake rather than large sporadic amounts. Your pharmacist can advise on specific timing windows.
Green tea significantly blocks iron absorption. If you are iron-deficient or taking iron supplements, do not drink green tea within 1-2 hours of your iron dose.
Many foods affect iron absorption significantly. Green Tea — if it's high in tannins (tea, coffee, chocolate), phytates (whole grains, legumes), or calcium (dairy), space it 2+ hours from your iron supplement. Citrus fruits and bell peppers (vitamin C-rich) enhance iron uptake — pair them together.
Fatigue, pale skin, shortness of breath, brittle nails — signs that iron supplementation may not be working effectively.
Adjust the timing or quantity of Green Tea relative to your medication. Maintain consistent daily intake rather than large sporadic amounts. Your pharmacist can advise on specific timing windows.
No urgent need to discuss, but always keep your doctor informed of your full supplement and medication list. An up-to-date list helps them make the best treatment decisions.
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