Vitamin K is necessary for the formation of prothrombin, a chemical required in blood clotting. It is also needed for liver and intestinal health, glucose metabolism, and is an important longevity factor. Additionally, vitamin K is required for the growth and maintenance of healthy bones. Vitamin K and calcium bind to one another to help maintain bone density. Vitamin K and vitamin D work together, helping the body utilize calcium. Vitamin K can also be used topically to support skin health. Studies have shown this vitamin to promote skin elasticity and reduce the time needed to heal bruised skin. For more information on vitamin K, see: https://ods.od.nih.gov/factsheets/VitaminK-Consumer/