K2 does probably not clear the arteries, that is, not reverse atherosclerosis in humans. It does this in mice, achieving stunning results in 6 weeks: http://www.ncbi.nlm.nih. read more
A man with a severely calcified aortic valve took 1 mg of K2 as MK-4 and 100 µg as MK-7, as well as 1000 µg of vitamin K1 every day. In 10 months his heart valve was NORMAL and healthy. MK-4 or menaquinone-4 is found naturally in pastured eggs, meat and butter. read more