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Is Zinc supplement Safe with Iron supplement?

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Iron supplement Zinc supplement
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Free · No account · based on published sources including NIH ODS, FDA drug labels, and peer-reviewed literature

WHAT YOU NEED TO KNOW

Separate iron and zinc supplements by at least 1–2 hours. If both are required therapeutically, take iron in the morning and zinc in the evening. Food may reduce the interaction but also reduces iron absorption.

Why this interaction occurs

Iron and zinc compete for absorption via the same DMT-1 transporter in the small intestine. High-dose supplemental iron (≥25 mg) significantly reduces zinc absorption. The interaction is more pronounced in fasted states and at higher iron-to-zinc molar ratios.

Evidence

Evidence level: strong.

Reported safety data

The FDA’s adverse event reporting system (FAERS) has received 136,322 reports mentioning Iron supplement. This reflects reported cases involving the medication in general — not confirmed causation, and not specific to the Iron supplement + supplement combination on this page.

FAERS reports are voluntary and cannot prove that a drug caused an event. Do not use report counts to assess the safety of this specific drug-supplement pair.

Frequently asked questions

Can I take Zinc supplement with Iron supplement?
Avoid unless your doctor or pharmacist directs otherwise. Separate iron and zinc supplements by at least 1–2 hours. If both are required therapeutically, take iron in the morning and zinc in the evening. Food may reduce the interaction but also reduces iron absorption.
How long should I wait between Iron supplement and Zinc supplement?
Separate iron and zinc supplements by at least 1–2 hours. If both are required therapeutically, take iron in the morning and zinc in the evening. Food may reduce the interaction but also reduces iron absorption.
Does Zinc supplement affect how well Iron supplement works?
Iron and zinc compete for absorption via the same DMT-1 transporter in the small intestine. High-dose supplemental iron (≥25 mg) significantly reduces zinc absorption. The interaction is more pronounced in fasted states and at higher iron-to-zinc molar ratios.

Related interactions

Zinc supplement and Calcium supplement Calcium supplement and Iron supplement Magnesium supplement and Iron supplement Copper supplement and Iron supplement

All Zinc supplement interactions →  ·  All Iron supplement interactions →

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Educational only — not medical advice.
Always confirm with your doctor or pharmacist.