Vitamin K is a vitamin used to regulate the body's clotting process (from where it gets it's name from the German Koagulations), bone metabolism and maintenance of blood vessels. It is found in most leafy vegetables and some fruits. The body requires very small quantities of the vitamin - a tablespoon-and-a-half of parsley contains enough to meet a body's daily needs. The body can also extract Vitamin K from meat and dairy products when these are digested by bacteria in the intestines.