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Do Whole Grains and Beans Block Zinc?
Phytate in grains and legumes lowers zinc absorption; soaking beans and grains before cooking and fermented foods may help, and animal zinc sources absorb better.[1]
Based on NIH Office of Dietary Supplements — Zinc fact sheet · Updated October 10, 2026
Phytate in grains and legumes lowers zinc absorption[1]
Phytates in grains and legumes bind zinc in the gut and inhibit its absorption, so zinc from these foods is less available than zinc from animal foods.
Soaking beans and grains before cooking, and fermented foods, may help; animal zinc sources absorb better.
Source [1]Zinc: Fact Sheet for Health Professionals. NIH Office of Dietary Supplements. (ods.od.nih.gov)
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- Do You Need Copper With Zinc?Zinc at 50 mg a day or more for weeks can interfere with copper absorption and lower copper status.
- Can You Take Magnesium and Zinc Together?One study found very high zinc supplement doses, 142 mg a day, can interfere with magnesium absorption and magnesium balance.
- Can You Take Iron and Zinc Together?Iron supplements of 25 mg or more taken at the same time as zinc supplements can lower zinc absorption and blood zinc.
Sources
- Zinc: Fact Sheet for Health Professionals. NIH Office of Dietary Supplements. ods.od.nih.gov
This page is general information from the cited sources, not medical advice. If you take prescription medication, are pregnant, or manage a health condition, check supplement changes with a pharmacist or doctor.