Vitamin K is a fat soluble vitamin used in the treatment of Vitamin K deficiency casuse by rooad-spectrum antibotics (used to treat infection), cephalosporins (used to treat infection), and prednisone (steroid). It is also supplemented in combination with other vitamins when malabsorption (decrease inability to absorb vitamins, mineral, and nutrients from food) is present. Vitamin K is given, under the supervision of a coctor, to newborn babies to prevent hemorrhange (bleeding) and to patients on blood thinning medicine whose blood has become too thin. Vitamin K has also been used in the prevention and treatment of osteoporosis (brittle bones). Kitamin K1 (phylloquinone) is found naturally in leafy cabbage, kale, lettuce, parsley, spinach, turnip greens and water cress), cauliflower, and the vegetable oils from soybean, cottonseed, canola, and olive. Bacteria present in the human bowel produce Vitamin K2. Other name for Vitamin K include: Vitamin K1 or Phylloquinone, Phytonadione, and Phytomenadione. Check with your doctor before taking Vitamin K