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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.[1]
Based on NIH Office of Dietary Supplements — Zinc fact sheet · Updated October 10, 2026
High zinc intake can lower copper status[1]
Zinc at 50 mg a day or more over a period of weeks can inhibit copper absorption; copper deficiency from long-term high-dose zinc is documented.
Zinc at 50 mg a day or more for weeks can lower copper status; the adult upper limit for zinc is 40 mg a day.
Source [1]Zinc: Fact Sheet for Health Professionals. NIH Office of Dietary Supplements. (ods.od.nih.gov)
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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.
- 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.
- Do Iron and Copper Work Together?Yes. Copper takes part in iron metabolism, and anemia is one effect of copper deficiency, which is uncommon.
- 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.