A fat soluble vitamin vitamin k is also known as menaquinone. Vitamin k can be produced by bacteria in the intestines and is(k1 is the form generally found in foods) also found naturally in foods such as raw dairy natto egg yolks and liver. Vitamin k2 supports healthy bones cardiovascular health and maintenance of strong bones. Vitamin k is necessary for bone forming cells also known as osteoblasts to activate osteocalcin which is a protein that helps bind calcium to bones.