\"Calcium (MHCA) is a microcrystalline form of calcium with superior bioavailability over other forms of calcium, as demonstrated consistently in clinical studies. Microcrystalline hydroxyapatite also provides additional minerals (magnesium, phosphorus, potassium, zinc), and proteins (osteocalcin, type I collagen, type I insulin growth factor I and II, transforming growth factor beta) associated with bone metabolism. Calcium is needed for the maintenance of normal bones.\"