Vitamin K

It participates in the process of blood clotting, and, specifically, in the formation of a full-fledged blood clot, stopping bleeding, and bone metabolism. Vitamin K deficiency impairs blood clotting, increases the tendency to bleed, can lead to hemorrhagic disease in infants. Elder people with lack of vitamin K may have osteoporosis. Deficiency of the vitamin may be responsible for some forms of male infertility, because the contractile protein in sperm tails, which provides its mobility, is depended on vitamin K.