AOR Vitamin K2 - An essential vitamin needed for cardiovascular, bone and liver health. Available science indicates that Vitamin K2 is superior to vitamin K1 in maintaining the health of the bones and vascular system. While MK-4 is the active form of vitamin used by the body, MK-7 has also been shown to provide good results at low doses in a sustained-release manner. AOR’s Vitamin K2 provides a 50/50 blend of MK-4 and MK-7 to ensure the best of both worlds. Ultimately, Vitamin K2 is an excellent adjunct to conventional osteoporosis medications and is essential for those taking calcium supplements. Vitamin K2 may also be useful for those with a family history of osteoporosis, cardiovascular disease, arterial calcification or for people who bruise or bleed easily.