Bone Builder is an exquisite comprehensive bone support formula featuring microcrystalline hydroxyapatite concentrate (MCHC). MCHC is a crystalline compound composed primarily of calcium, phosphorus, bone-derived growth factors, protein matrix, and trace mineralsÑingredients that naturally comprise healthy bone. Along with regular exercise and a healthy diet, adequate calcium intake helps to maintain bone health and reduce the rate of bone loss or bone thinning.*