Supports Bone Health Plus Cardiovascular Support Non-GMO A Dietary Supplement Kosher Vitamins Family Owned Since 1968 GMP Quality Assured NOW combines two nutrients extensively researched for their contribution to the health of bones, teeth and the cardiovascular system. Vitamin D3 promotes Calcium transport and absorption. Recent studies indicate that Vitamin D3 may play a role in proper insulin action and glucose metabolism and has an important function within the immune system. Vitamin K is critical for the formation of a healthy, strong bone matrix. Vitamin K's role in arterial health resolves around its ability to support proper Calcium metabolism in vascular structures. Vitamin K2 is a readily active and biologically available form of Vitamin K.