Vitamin K and Warfarin Coumadin (1383)
Key points below
What do I need to know about Warfarin and vitamin K?
Warfarin (Coumadin) is a medicine that helps keep the blood from clotting.
- Many foods and supplements can affect how the medicine works.
Vitamin K works to clot blood. That means it can weaken the effect of Warfarin.
- People who take Warfarin do not need to avoid foods that contain vitamin K.
- Many foods with vitamin K are healthy and should be included as part of a healthy diet.
The most important thing is to keep the amount of vitamin K in your diet the same from day to day.
- If you take in more vitamin K than normal, you are more at risk for clotting.
- If you take in less vitamin K than normal, you are at risk for bleeding.
Kale
Cooked: 1/2 cup - 531 mcg
Raw: 1 cup - 113 mcg
Spinach
Cooked: 1/2 cup - 444 mcg
Raw: 1 cup - 145 mcg
Collards
Cooked: 1/2 cup - 418 mcg
Raw: 1 cup - 184 mcg
Swiss Chard
Cooked: 1/2 cup - 287 mcg
Raw: 1 cup - 299 mcg
Turnip Greens
Cooked: 1/2 cup - 265 mcg
Raw: 1 cup - 138 mcg
Mustard Greens
Cooked: 1/2 cup - 210 mcg
Raw: 1 cup - 279 mcg
Parsley, Raw
Raw: 1/4 cup - 246 mcg
Broccoli
Cooked: 1 cup - 220 mcg
Raw: 1 cup - 89 mcg
Brussels Sprouts
1 cup - 219 mcg
Endive Lettuce, Raw
1 cup - 116 mcg
Fruits (besides those listed above), dairy products, grains, and meat/poultry typically have low amounts of vitamin K
Remember: Avoid alcohol, grapefruit juice and herbal medicines and teas while taking Warfarin.
For other health and wellness information, check out this resource: https://kidshealth.org/ChildrensWi/en/parents