Is Zinc Safe with L-Methylfolate?
Free · No account · based on published sources including NIH ODS, FDA drug labels, and peer-reviewed literature
Separate doses of zinc and L-Methylfolate by at least 2 hours. Avoid high-dose zinc supplementation (above 40 mg/day) unless directed by a clinician.
Why this interaction occurs
High-dose zinc supplementation has been shown to interfere with folate absorption at the intestinal level by competing for carrier-mediated transport systems. This can reduce the bioavailability of L-Methylfolate, undermining its intended effect on the methylation cycle and neurotransmitter synthesis.
Evidence
Evidence level: limited.
Reported safety data
The FDA’s adverse event reporting system (FAERS) has received 35,992 reports mentioning L-Methylfolate. This reflects reported cases involving the medication in general — not confirmed causation, and not specific to the L-Methylfolate + 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 L-Methylfolate interactions →
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Educational only — not medical advice.
Always confirm with your doctor or pharmacist.