Calcium: This mineral is well known for its essential role in the formation of bones and tooth enamel; however, it also performs many other  functions. Calcium is involved in fat and protein digestion and the production of energy. It is involved in blood clotting and the transmission of  nerve impulses, and it regulates the contraction and relaxation of muscles, including the heart. In addition, calcium may reduce the risk of colon  cancer and suppress the growth of polyps that can lead to cancer. Magnesium: Besides its role in maintaining healthy bones by promoting the absorption of calcium, magnesium is involved in maintaining a healthy  nervous system. In addition, magnesium is required for muscle relaxation, energy production, protein formation, cellular replication, the regulation of  sodium and potassium in the cells, and effi cient heart function. Vitamin D: This vitamin regulates calcium metabolism. Without vitamin D, the body cannot properly absorb calcium, and the bones and teeth become  soft and poorly mineralized. Product Details Supplement Facts Suggested Use Reviews Recommended For You...