What is Vitamin K? Vitamin K is a fat-soluble vitamin found in green leafy vegetables, vegetable oils and cereal grains. Full-fat dairy products also contain a form of vitamin K. It was discovered in the early part of the 20th century and found to have an important role in coagulation (clotting) of the blood. It was considered such a significant development that the two scientists who first studied it were awarded the Nobel Prize for […]