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Answers from the BJC Experts

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Is there a diet for people on coumadin and what about foods with vitamin K?

Vitamin K occurs naturally in some foods. Its role is to help blood clot. So, if you get a cut, it's the components of vitamin K that help stop the bleeding.

If you take coumadin (a blood thinner), you should understand vitamin K sources— mostly dark, green leafy foods: broccoli, spinach and brussel sprouts. These foods are good for us in general. Be consistent with your intake of vitamin K foods. Don't eat more than you would normally eat, but don't stop eating them altogether, if they have always been a part of your diet.

Make an appointment with a registered dietitian at:

BJC dietitians also can be located by calling Help For Your Health at 314.747.7234.

From Ask the Pharmacist

In general:

  • Concurrent use of Coumadin (warfarin) and high-protein diets may result in reduced warfarin anticoagulant effectiveness (more chance of clotting)
  • Concurrent use of warfarin and vitamin K foods (like leafy greens and vegetables) may result in altered anticoagulant effectiveness
  • Concurrent use of warfarin and cranberry juice may result in an increased risk of bleeding

Talk with your doctor or a dietitian before making drastic changes in your diet.

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