Is Vitamin E (Alpha-Tocopherol) Safe with Vitamin A high dose?
Free · No account · based on published sources including NIH ODS, FDA drug labels, and peer-reviewed literature
Limit Vitamin E supplementation to standard dietary reference intake levels when on high-dose Vitamin A therapy. Monitor for signs of Vitamin A toxicity as Vitamin E may alter hepatic retinol storage and metabolism.
Why this interaction occurs
High-dose Vitamin E (>400 IU/day) can interfere with hepatic Vitamin A metabolism and storage, potentially displacing retinol from binding proteins and altering its distribution, which may paradoxically worsen toxicity risk or reduce therapeutic efficacy.
Evidence
Evidence level: moderate.
Reported safety data
The FDA’s adverse event reporting system (FAERS) has received 5,826,371 reports mentioning Vitamin A high dose. This reflects reported cases involving the medication in general — not confirmed causation, and not specific to the Vitamin A high dose + 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 Vitamin E (Alpha-Tocopherol) interactions → · All Vitamin A high dose interactions →
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Educational only — not medical advice.
Always confirm with your doctor or pharmacist.