While it was initially marketed as a rodenticide, it has been used as a medication for more than a half-century. (n.d.).Warfarin is a vitamin K antagonist used as an anticoagulant used for treatment and prevention of a variety of coagulopathic and thromboembolic disorders. Interaction between dietary vitamin K intake and anticoagulation by vitamin K antagonists: is it really true?: A systematic review. Alcohol misuse, genetics, and major bleeding among warfarin therapy patients in a community setting. You can learn more about how we ensure our content is accurate and current by reading our editorial policy. We link primary sources - including studies, scientific references, and statistics - within each article and also list them in the resources section at the bottom of our articles. Medical News Today has strict sourcing guidelines and draws only from peer-reviewed studies, academic research institutions, and medical journals and associations. Keeping a food diary and being aware of foods that are high in vitamin K can help a person keep track. Keeping vitamin K levels stable, and within a normal range, may reduce its effect on the actions of warfarin.
As this amount is so small, it can be easy for vitamin K levels to fluctuate across different days, creating a problem for people on warfarin. The average person only needs a small amount of vitamin K, around 60 to 80 micrograms (mcg) per day. The authors suggest that keeping vitamin K levels consistent may be more beneficial. It is important to note that the guidance varies on how much vitamin K people on warfarin can consume.įor example, a recent systematic review suggests a diet that restricts vitamin K intake is unlikely to improve the efficacy of warfarin. The foods that contain vitamin K also have other nutritional properties that contribute to a healthful diet. It is not necessary to cut out foods that contain vitamin K entirely. The AHA’a list of 19 foods high in vitamin K includes: This is the time it takes for a blood clot to form. The American Heart Association (AHA) suggest that eating vitamin K-rich foods may counteract the effects of warfarin, and lower the prothrombin time. It is possible that eating a diet rich in vitamin K could reduce the effect of warfarin on clotting factors. Warfarin can reduce the chances of a dangerous blood clot forming by increasing the time it takes for the liver to produce clotting factors. Warfarin disrupts this clotting process by inhibiting an enzyme in the liver that uses vitamin K to form clotting factors. The liver uses vitamin K to produce clotting factors, which are cells that help to control bleeding and enable blood clots to form. Vitamin K, which is in some foods, has an important role in blood clotting, and how warfarin works. Share on Pinterest Asparagus is high in vitamin K.
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