Does Iron Bisglycinate interact with Zinc Picolinate?

Written to our editorial standards · reviewed against published research· Updated 2 Jun 2026
Space them apart· moderate evidence

High-dose iron and zinc compete for absorption.

Taken together in large supplemental doses, iron and zinc share absorption pathways in the gut and can each reduce the other's uptake. At the modest amounts found in food or a multivitamin this competition is minor.

What to do

If you supplement therapeutic doses of both, separate them by a couple of hours, for example iron in the morning on an empty stomach with vitamin C, and zinc with dinner to avoid nausea. Keep zinc under about 40 mg a day long-term.

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Iron Bisglycinate
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Zinc Picolinate
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Common questions

Can I take Iron Bisglycinate and Zinc Picolinate together?
Space them apart. If you supplement therapeutic doses of both, separate them by a couple of hours, for example iron in the morning on an empty stomach with vitamin C, and zinc with dinner to avoid nausea. Keep zinc under about 40 mg a day long-term.
Why do Iron Bisglycinate and Zinc Picolinate interact?
Taken together in large supplemental doses, iron and zinc share absorption pathways in the gut and can each reduce the other's uptake. At the modest amounts found in food or a multivitamin this competition is minor.

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Educational use only, not medical advice. Interaction risk depends on dose, your health, and any medications. Always consult a qualified clinician, especially if you take prescription drugs or are pregnant or nursing.