Microcrystalline Hydroxyapatite (MCHA) is a natural compound that makes up the crystalline matrix of bone and teeth and is the substance that gives them their rigidity. MCHA is a source of highly absorbable Calcium and Phosphorus which are the major mineral components of bone. NOW Bone Strength is a comprehensive bone support product providing 4 g (4000 mg) of MCHA. It also contains Magnesium and other important minerals as well as Vitamins C D and K to aid in the synthesis and maintenance of bone tissue.Other products from HerbsPro