Cal Apatite Bone Builder® is complete bone nutrition featuring purity-certified, calcium-rich microcrystalline hydroxyapatite concentrate (MCHC), a complex crystalline compound composed primarily of calcium, phosphorus, and organic factors that naturally comprise raw bone. The MCHC in Cal Apatite Bone Builder is cold-processed to preserve the delicate protein matrix and organic factors. Calcium, along with regular excercise and a healthy diet, can play a significant role in reducing the rate of bone loss or bone thinning and protecting bone strength.