Calcium Plus contains Ossopan, a well-researched, standardized extract from one of the world’s safest premium sources of bone. Ossopan contains microcrystalline hydroxyapatite concentrate (MCHC), a complex crystalline compound containing calcium, phosphorus, bioactive growth factors, type I collagen, amino acids, glycosaminoglycans, and a broad range of essential trace elements that naturally comprise healthy bone. Calcium Plus contains additional calcium and magnesium in the form of highly absorbable Albion® minerals. Vitamin D, in the form of cholecalciferol, supports intestinal calcium absorption and homeostasis in the body and completes the comprehensiveness of this bone-support formula.*