A dietary supplement to support bone function. This formula contains three types of chelated Calcium-calcium citrate, calcium aspartate, & calcium carbonate, so your body can assimilate the minerals efficiently. The Calcium & Magnesium potencies are balanced in a 1:1 ratio, at 450 mgs of each & Vitamin D3 is added to make this a complete formula. A deficiency in Vitamin D3 can inhibit your body's ability to absorb Calcium & Magnesium.