Is Zinc Safe with Calcium citrate?
Free · No account · based on published sources including NIH ODS, FDA drug labels, and peer-reviewed literature
Separate calcium citrate and zinc by at least 1-2 hours when possible. This is especially important at high doses of either supplement.
Why this interaction occurs
Citrate chelation properties may partially mitigate the competitive absorption interference seen with calcium carbonate, but competition for intestinal transporters still occurs. The clinical significance is lower than with calcium carbonate but separation is still advisable for optimal zinc status.
Evidence
Evidence level: moderate.
Reported safety data
The FDA’s adverse event reporting system (FAERS) has received 1,123,384 reports mentioning Calcium citrate. This reflects reported cases involving the medication in general — not confirmed causation, and not specific to the Calcium citrate + 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
Related interactions
All Zinc interactions → · All Calcium citrate interactions →
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Educational only — not medical advice.
Always confirm with your doctor or pharmacist.