On blood thinners? Supplements to be careful with

If you take an anticoagulant (such as warfarin) or antiplatelet (such as aspirin), some supplements can raise bleeding risk or change how your medication works. Below are ingredients that need extra care. This is general information — any change must be discussed with your physician.

May increase bleeding risk

High-dose omega-3, ginkgo, curcumin, high-dose vitamin E, and garlic supplements can affect platelets or clotting, potentially increasing bleeding tendency alongside anticoagulants.

May work against your medication

Vitamin K (especially K2) directly antagonizes warfarin, which works by blocking vitamin-K-dependent clotting factors — so starting vitamin K can reduce the drug's effect. Coenzyme Q10 has also been reported to influence warfarin.

What to do

The key rule: tell your doctor or pharmacist before starting or stopping any supplement. Warfarin in particular is dosed by regular INR testing, and supplement changes can move those numbers. Rather than starting or stopping large amounts suddenly, keep intake consistent and adjust with a professional.

This is general reference information, not personal medical advice. Always consult your physician.