Supplements That Interact With Blood Thinners
If you take warfarin, aspirin, clopidogrel, or any other anticoagulant, checking your supplements for interactions is essential. Several common herbs and supplements have antiplatelet or anticoagulant properties that can increase bleeding risk when combined with prescription blood thinners. Here are the most important ones to know about.
Turmeric & Blood Thinners
Curcumin inhibits platelet aggregation and CYP2C9, the enzyme that breaks down warfarin.
Ginkgo Biloba Interactions
Blocks platelet-activating factor. Case reports of spontaneous bleeding including eye hemorrhage.
Garlic Supplements & Blood Thinners
Ajoene inhibits platelet aggregation. Cooking garlic is fine; concentrated supplements are the concern.
Fish Oil & Omega-3 Interactions
Under 3g daily generally safe. Above 3g, antiplatelet effects become clinically significant.
Cranberry & Warfarin
The 2004 scare was overblown. Moderate juice is fine. Concentrated supplements warrant more caution.
CBD Oil Drug Interactions
CBD inhibits CYP enzymes that metabolize warfarin, with documented INR elevation in case reports.
Green Tea Extract Interactions
Brewed tea contains vitamin K (opposes warfarin). Extract has antiplatelet catechins instead.
Check your specific combination
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