CARUSO'S Vitamin K2+D3 Bone Support 30 Capsules Your body requires a balance of vitamins and minerals and none is as important for bone health as Vitamin K2 and Vitamin D3. In fact, Vitamin K2 is the biological partner of Vitamin D3. Both vitamins work side by side in the process of calcium absorption and bone modelling. It is well known that Vitamin D3 aids in the absorption of Calcium from the diet to promote strong healthy bones. However Vitamin K2 also plays a crucial role in the actual building of bones as it directs Calcium into your bones. Without Vitamin D3, calcium cannot be absorbed from the diet and without Vitamin K2, calcium will not bind to bone. Therefore the two Vitamins are both necessary for bone building. The role of Vitamin D in this process is to maintain skeletal calcium balance by promoting the absorption of calcium in the intestines and maintaining calcium levels for bone formation. Vitamin K2’s unique effect is that it activates Osteocalcin. This protein starts the bone mineralisation process and the Calcium mineral is added to the structure of the bone matrix and helps to build and maintain healthy bones.