Warfarin Blocks Vitamin K’s Actions
Vitamin K is one of the fat-soluble vitamins. It is essential for normal blood clotting in humans. There are two forms of the vitamin, vitamin K1, and Vitamin K2. Vitamin K1 is found in many foods, especially green leafy vegetables. It can also be found in soybean and olive oils, mayonnaise, and organ meats. Vitamin K2 is produced in the intestine. Most Americans consume enough vitamin K in their diet to maintain normal blood clotting and do not require vitamin K supplements.
Warfarin is a blood thinning medication. It slows down the blood clotting process in the body. Warfarin is used by many people to prevent blood clots and stroke. Warfarin blocks the action of vitamin K in the body, which reduces the blood’s ability to clot. People taking warfarin should eat consistent amounts of vitamin K-containing foods. However, overconsumption of vitamin K-containing foods by patients taking warfarin can increase the risk of blood clots or stroke. Vitamin K is also available by prescription in tablet form. It is used mainly as an antedote to warfarin overdose or in cases of bleeding due to warfarin use.