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Can I Take Iron and Zinc Together? Competition & Absorption Guide

Iron and zinc compete for the same absorption pathway. Learn how to take both safely.

Quick Answer

Iron and zinc compete for absorption.

Recommendation: Take separately for better absorption.

iron + zinc

High Riskcompetition

Iron and zinc compete for absorption.

Tip: Take separately for better absorption.

Safe Dosage Comparison (5 Regional Standards)

Standardironzinc
US (FDA)18 / 45 mg
(RDA/UL)		11 / 40 mg
(RDA/UL)
EU (EFSA)18 / 45 mg
(RDA/UL)		11 / 40 mg
(RDA/UL)
AU (TGA)18 / 45 mg
(RDA/UL)		11 / 40 mg
(RDA/UL)
CN (CNS)20 / 42 mg
(RDA/UL)		12.5 / 40 mg
(RDA/UL)
JP (MHLW)10.5 / 50 mg
(RDA/UL)		10 / 40 mg
(RDA/UL)

Values shown as RDA (Recommended Dietary Allowance) / UL (Tolerable Upper Intake Level). Sources: NIH, FDA, EFSA, FSANZ, CNS, MHLW.

Frequently Asked Questions

Why shouldn't I take iron and zinc at the same time?

They compete for the same absorption transporter. Concurrent supplementation can reduce zinc absorption by up to 50%.

Taking More Supplements?

This page only checks one pair. Use NutriAudit to check your full supplement stack for interactions, duplicates, and safe dosages.

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Not medical advice. Always consult a qualified healthcare professional for personal medical decisions.