Vitamin K deficiency results from extremely inadequate intake or fat malabsorption. Risk of bleeding is increased by use of coumarin anticoagulants. Deficiency is particularly common among breastfed infants. It impairs clotting. Diagnosis is suspected based on routine coagulation study findings and confirmed by response to vitamin K . Treatment consists of vitamin K given orally or, when fat malabsorption is the cause or when risk of bleeding is high, parenterally. The main symptom of a vitamin K deficiency is bleeding caused by an inability to form blood clots. Learn about vitamin K deficiency in adults and infants. Vitamin K , like vitamins A, D, and E, is a fat-soluble vitamin , which dissolves in fat and is best absorbed when eaten with some fat. Good sources of vitamin K include green leafy vegetables (such as collards, spinach, and kale) and soybean and canola oils. Vitamin K comprises a group of fat-soluble compounds. Several vitamin K -dependent proteins are involved in essential processes such as blood clotting, bone metabolism, and cardiovascular health. Vitamin K deficiency can contribute to significant bleeding, poor bone development, osteoporosis, and increased cardiovascular disease. According to the National Academy of Science Food and Nutrition Board, the recommended dietary intake for healthy adults is 120 μg/d for men and 90 μg/d for women.
