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Can I Take Vitamin E and Vitamin K Together? Blood Clotting Risk

High-dose vitamin E may interfere with vitamin K blood clotting function. Learn the safe dosage limits.

Quick Answer

High doses of Vitamin E may interfere with Vitamin K function.

Recommendation: Keep Vitamin E below 400 IU if taking blood thinners.

vitamin e + vitamin k

Moderateabsorption inhibition

High doses of Vitamin E may interfere with Vitamin K function.

Tip: Keep Vitamin E below 400 IU if taking blood thinners.

Safe Dosage Comparison (5 Regional Standards)

Standardvitamin evitamin k
US (FDA)15 / 1000 mg
(RDA/UL)		120 / 1000 mcg
(RDA/UL)
EU (EFSA)15 / 1000 mg
(RDA/UL)		120 / 1000 mcg
(RDA/UL)
AU (TGA)15 / 1000 mg
(RDA/UL)		120 / 1000 mcg
(RDA/UL)
CN (CNS)14 / 800 mg
(RDA/UL)		120 / 1000 mcg
(RDA/UL)
JP (MHLW)15 / 900 mg
(RDA/UL)		120 / 1000 mcg
(RDA/UL)

Values shown as RDA (Recommended Dietary Allowance) / UL (Tolerable Upper Intake Level). Sources: NIH, FDA, EFSA, FSANZ, CNS, MHLW.

Frequently Asked Questions

Does vitamin E interfere with vitamin K?

High doses (above 400 IU/day) can interfere with vitamin K-dependent clotting. Primarily a concern for people on blood thinners.

Taking More Supplements?

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Not medical advice. Always consult a qualified healthcare professional for personal medical decisions.