Studies show that mineral citrates and malates have superior absorption, especially when taken on an empty stomach. Each tablet has calcium and magnesium in a one-to-one ratio that many health professionals now recommend. Calcium is required for strong bones, teeth and cardiac function. Calcium not only builds strong bones and teeth but maintains bone density and strength. As well as protecting the body from stress, magnesium works with calcium to provide help to these same body systems and participates in more than 50 different biochemical reactions. That's why magnesium is so important to bone formation, nerve and muscle transmission, and energy production. This formula also includes other minerals, including manganese, potassium and zinc, which are also in the citrate form for better absorption and utilization by the cells, as they provide a valuable contribution to bone strength. Vitamin D is included because it acts as a hormone that allows the body to absorb and properly use calcium.