If you are taking an anticoagulant or a blood thinner, like Warfarin (Coumadin), then it is important to keep your PT/INR (Prothrombin Time and International Normalized Ratio) levels stable. PT/INR measure factors for blood coagulation.
In order to maintain stable PT/INR levels you should not eat more than 1 serving of a high vitamin K food, and no more than 3 servings of a food with moderate amounts of vitamin K. What is important is that your intake of vitamin K stays consistent. Having a cheat day where you eat a large amount of vitamin K, like a spinach salad, could be extremely harmful.
This is a guide to which foods you can eat and in what amounts. Exact amounts will depend on your dosage of Warfarin. Listed below are foods low in vitamin K presented by food group with sample serving sizes and amounts of vitamin K. For more ideas, use the nutrient ranking tool to sort by food group and serving size.
Avoid grapefruit and cranberries. Citrus fruits, like oranges, should also be limited or avoided. Approach mangoes, blueberries, and pomegranate with caution as these fruits can also affect PT/INR. See the full list of fruits low in vitamin K. Low vitamin K does not necessarily guarantee safe administration of Warfarin (Coumadin).
Grains/Starches Low in Vitamin K
All grain products are low in vitamin K. Here are some examples:
Vitamin K Content
0μg (0% DV)
0.4μg (1% DV)
0.2μg (0% DV)
Cornmeal (White or Yellow)
0.4μg (0% DV)
0.9μg (1% DV)
1.3μg (1% DV)
0μg (0% DV)
Whole Wheat Bread
0μg (0% DV)
3.2μg (4% DV)
0.5μg (1% DV)
0.0μg (0% DV)
See the full list of grains low in vitamin K. Low vitamin K does not necessarily guarantee safe administration of Warfarin (Coumadin).
Other Food Groups
All meats are low in vitamin K with the exception of some canned fish packed in oil, and abalone. All Dairy and Egg Products are low in Vitamin K. Besides black-eyed peas, soybeans, soy products, and green beans, all beans and legumes are low in vitamin K. If you are into juicing, here are some low vitamin K juice recipes.
Avoid making any big changes to your diet. If you try any new food, try it in small quantities and monitor your PT/INR
Even though a food is low in vitamin K it does not mean that it will not interact with Warfarin (Coumadin). This article is intended as a general guide for foods low in vitamin K and is for information purposes only. As stated above, try new foods with caution and consult health care providers or literature before trying new foods.