Vitamin K (Menadione) is known as the clotting vitamin, because without it blood would not clot or coagulate, properly. The “K” comes from its German name, Koagulationsvitamin.
Vitamin K also plays an important role in bone health. Your body needs vitamin K to use calcium to build bone. People who have higher levels of vitamin K have greater bone density, while low levels of vitamin K have been found in those with osteoporosis.
There is increasing evidence that vitamin K improves bone health and reduces risk of bone fractures, particularly in postmenopausal women who are at risk for osteoporosis. In addition, studies of male and female athletes have also found that vitamin K helps with bone health.
Vitamin K also prevents internal bleeding and reduces heavy menstrual flow.