| Vitamin K is found in healthy foods like leafy greens. Vitamin K helps blood to clot, so it can change the way warfarin works. This does NOT mean you need to stop eating foods with vitamin K. Your goal is to eat about the same amount of vitamin K each day. You can do this by eating the same amount of high and medium level vitamin K foods each day using the list below. If you are not able to eat for a few days or are making big changes in your diet, call your doctor. Vitamin pills, herbs, or other supplements such as calcium soft chews can have vitamin K in them or can interact with warfarin. Always show your doctor the label of ALL vitamins, herbs, or other supplements that you take. | ||
| Food name | Serving size | Vitamin K (micrograms) |
| High vitamin K foods | ||
| Brussels sprouts, fresh (cooked, drained) | 1/2 cup | 110 |
| Brussels sprouts, frozen (cooked, drained) | 1/2 cup | 150 |
| Greens, beet fresh (cooked, drained) | 1/2 cup | 350 |
| Greens, collard frozen (cooked, drained) | 1/2 cup | 530 |
| Greens, collard fresh (cooked, drained) | 1/2 cup | 365 |
| Greens, mustard fresh (cooked, drained) | 1/2 cup | 415 |
| Greens, turnip fresh (cooked, drained) | 1/2 cup | 265 |
| Greens, turnip frozen (cooked, drained) | 1/2 cup | 425 |
| Kale, fresh (cooked, drained) | 1/2 cup | 530 |
| Kale, frozen (cooked, drained) | 1/2 cup | 565 |
| Spinach, fresh (cooked, drained) | 1/2 cup | 444 |
| Spinach, frozen (cooked, drained) | 1/2 cup | 514 |
| Spinach, fresh (raw) | 1 cup | 150 |
| Medium vitamin K foods | ||
| Asparagus, frozen (cooked, drained) | 1/2 cup | 72 |
| 4 spears | 48 | |
| Asparagus, fresh (cooked, drained) | 4 spears | 30 |
| Beans, green or yellow, fresh (cooked, drained) | 1/2 cup | 10 |
| Broccoli, fresh (cooked, drained) | 1 spear | 26 |
| Broccoli, frozen (cooked, drained) | 1/2 cup | 80 |
| Broccoli, raw | 1/2 cup | 45 |
| Cabbage (cooked, drained) | 1/2 cup | 80 |
| Cabbage, chinese bok-choi (cooked, drained) | 1/2 cup | 28 |
| Cabbage, green (raw) | 1/2 cup | 26 |
| Cabbage, red (raw) | 1/2 cup | 14 |
| Cabbage, savoy (raw) | 1/2 cup | 24 |
| Calcium soft chews (brand name Viactiv with D) see above about other vitamin pills | 1 chew | 40 |
| Carrots, fresh or frozen (cooked, drained) | 1/2 cup | 10 |
| Cauliflower, fresh or frozen (raw or cooked, drained) | 1/2 cup | 10 |
| Celery, raw | 1/2 cup | 17 |
| Coleslaw (fast food-type) | 1/2 cup | 37 |
| Endive | 1/2 cup | 60 |
| Lettuce (butterhead, Boston, bibb) | 1/2 head | 80 |
| Lettuce (iceberg, crisphead) | 1/2 head | 65 |
| Lettuce (romaine, cos) | 1 cup | 57 |
| Lettuce (green leaf) | 1 cup | 97 |
| Oil, canola | 1 tablespoon | 17 |
| Okra, fresh (cooked, drained) | 1/2 cup | 32 |
| Okra, frozen (cooked, drained) | 1/2 cup | 44 |
| Peas, frozen, with pod (cooked, drained) | 1/2 cup | 24 |
| Peas, fresh, with pod (cooked, drained) | 1/2 cup | 20 |
| Peas, green, frozen (cooked, drained) | 1/2 cup | 18 |
| Pickle relish, sweet | 1 tablespoon | 13 |
| Pickles, cucumber dill or kosher dill | 1 pickle | 25 |
| Sauerkraut, canned | 1/2 cup | 56 |
| Vegetables, mixed frozen or canned (cooked, drained) | 1/2 cup | 20 |
| Low vitamin K foods | ||
| Avocado | 1 ounce | All of these foods have less than 10 micrograms of vitamin K per serving |
| Bananas | 1 banana | |
| Chickpeas (garbanzo beans) | 1/2 cup | |
| Corn | 1/2 cup | |
| Fruit (fresh, frozen or canned including apples, nectarines, peaches, watermelon) | Whole piece of fresh fruit, 1 wedge of watermelon, or 1/2 cup | |
| Mayonaise | 1 tablespoon | |
| Oil, olive | 1 tablespoon | |
| Oil, other (including peanut, sesame, safflower, corn, sunflower, soybean) | 1 tablespoon | |
| Peppers, green or red | 1/2 pepper or 1/2 cup | |
| Potatoes | 1 potato or 1/2 cup | |
| Seaweed, kelp (raw) | 1 tablespoon | |
| Tomatoes | 1 tomato or 1/2 cup | |
| Very low vitamin K foods, but MIGHT change how warfarin or other medicines work | ||
| Cranberry juice | 4 ounces juice | If you eat these foods, limit the amount to one or two servings per day |
| Grapefruit | 4 ounces juice | |
| 1/2 grapefruit | ||
| Green tea, brewed | 4 ounces | |
