Vitamin K - Vitamin K helps synthesize at least six (out of 12) of the proteins involved in blood clotting, without Vitamin K, your bleeding would not clot and you would very likely bleed to death. Vitamin K is found in so many foods that deficiency is rare in healthy people. Newborns are the exceptions, they are born with very little vitamin K from their mother. To control the risk of uncontrolled bleeding, most newborns get a one-time injection or oral dose of vitamin K before they leave the hospital. Large doses of aspirin, and high doses of vitamin A or E may block K absorption.