We use essential cookies (authentication, your saved goals/stack) by default. With your permission we'll also enable privacy-respecting analytics (Vercel Web Analytics, anonymous load-time metrics) and error-replay diagnostics (Sentry — DOM snapshots only when an error fires) so we can fix bugs faster. Learn more about cookies
Multivitamin and Vitamin E can interact. Combined intake above 400 IU/day has been associated with increased all-cause mortality in meta-analyses (though causality debated). Anticoagulant effect is clinically meaningful at combined doses above 400mg/day, especially with anticoagulant medications. Keep combined vitamin E below 400mg/day (approximately 600 IU). Avoid combining with blood-thinning medications without medical supervision. Use mixed tocopherol forms rather than isolated alpha-tocopherol to avoid tocopherol displacement.
Combined intake above 400 IU/day has been associated with increased all-cause mortality in meta-analyses (though causality debated). Anticoagulant effect is clinically meaningful at combined doses above 400mg/day, especially with anticoagulant medications.
Multivitamins contain 15–100mg (22–150 IU) of vitamin E (alpha-tocopherol). The tolerable upper intake level is 1000mg/day. At high combined doses, vitamin E inhibits platelet aggregation and antagonizes vitamin K-dependent clotting factors (factors II, VII, IX, X), increasing bleeding risk. High-dose alpha-tocopherol also displaces other tocopherols (gamma, delta) and may paradoxically increase oxidative stress markers.
What to do: Keep combined vitamin E below 400mg/day (approximately 600 IU). Avoid combining with blood-thinning medications without medical supervision. Use mixed tocopherol forms rather than isolated alpha-tocopherol to avoid tocopherol displacement.
This information is for educational purposes only. It is not a substitute for professional medical advice. Always consult a qualified healthcare provider before starting, stopping, or changing any supplement or medication.