Vitamin K is a fat-soluble vitamin responsible for regulating the synthesis of blood-clotting proteins and aids in the incorporation of calcium into your bones. Some vitamin K is produced by bacteria in your intestines, but most must still be acquired through your diet. Medline Plus notes that vitamin K deficiency is rare and generally occurs when your body can't properly absorb the vitamin from the intestinal tract.
However, some individuals on blood thinner medication, such as Coumadin must monitor vitamin K intake keeping it as stable as possible. Large increases or decreases in vitamin K intake could decrease the effect of the medication. High levels of vitamin K are found in several foods, particularly leafy, green vegetables.
Kale
Kale is a leafy green vegetable that can be eaten raw, baked or boiled. One-half cup of chopped kale contains 684 percent of the daily value for vitamin K.
Spinach
Spinach is a very nutritious leafy green that is high not only in vitamin K, but also in vitamins A and C and is also a good source of folate and iron. Spinach can be eaten raw or boiled. One-half cup of spinach contains 560 percent of the daily value of vitamin K.
Turnip Greens
The leaves of turnips, or turnip greens, can be eaten as a source of vitamin K. One-half cup of frozen or boiled turnip greens contains 530 percent of the daily value for vitamin K. Raw turnip greens contain only 170 percent.
Collards
Collards, or collard greens, is a good source of vitamins A and C. One-half cup of fresh or boiled collards contains 520 percent of the daily value of vitamin K.
Chard
The leaves of chard are edible and one-half cup of it fresh or boiled contains 360 percent of the daily value of vitamin K.
Brussel Sprouts
Brussel sprouts are a small green vegetable that resembles a miniature cabbage. One-half cup of frozen or boiled brussel sprouts contains 190 percent daily value of vitamin K.
References
- "Nutrition Through the Life Cycle, Third Edition"; Judith E. Brown; 2008
- Medline Plus: Vitamin K
- National Institutes of Health Warren Grant Magnuson Clinical Center: Coumadin and Vitamin K
- University of Utah: University Health Care Thrombosis Service



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