Vitamin K refers to a group of fat-soluble vitamins that play a crucial role in blood clotting. They act as a co-factor for seven vitamin K-dependent clotting factors, because without vitamin K, your blood is unable to clot. You get vitamin K from a variety of foods in your diet. Rich sources include liver, turnip greens, broccoli, kale, cabbage and asparagus. Vitamin K causes the blood to coagulate, thereby reducing the risk of bleeding. This effect may interact with certain medications.
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Blood Clotting Interactions
Some individuals are at risk of developing dangerous blood clots, which can lead to heart attack or stroke. If this is the case, your doctor may prescribe a blood thinner. If you are prescribed a blood thinner, avoid taking vitamin-K supplements. You may also need to avoid vitamin K-rich foods. Vitamin K blocks the effects of the blood-thinning medication warfarin, which can increase the risk of clotting, according to the University of Maryland Medical Center.