Vitamin K Sym: phylloquinone, Menadione, Menaquinone, naphthoquinone Without vitamin K, your blood would not clot and you would very likely bleed to death. Of the 13 proteins needed for clotting K is essential to the making of at least six. Vitamin K is found in so many foods that deficiency is rare. Newborns are the exception: they are not born with vitamin K producing bacteria in the intestines, and get no vitamin K from their mothers or breastmilk. The result is a very real risk of uncontrolled bleeding. To prevent this, most newborns get a one-time injection or oral dose of vitamin K before they leave the hospital.