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Multivitamin and Vitamin K2 have at most a minor documented interaction. Check how much vitamin K each product contains. If you take warfarin or another vitamin K antagonist, do not start, stop or change vitamin K without the prescriber, because a change in vitamin K intake changes how the medicine works.
No benefit of combining them is established by the evidence supplied, and no reduction in vascular calcification is shown. Total vitamin K intake matters mainly for people taking a vitamin K antagonist such as warfarin.
Many multivitamins contain vitamin K1, and a vitamin K2 product adds more vitamin K.
What to do: Check how much vitamin K each product contains. If you take warfarin or another vitamin K antagonist, do not start, stop or change vitamin K without the prescriber, because a change in vitamin K intake changes how the medicine works.
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.