LuckyVitamin - Bone Strength System - 240 Capsules Microcrystalline Hydroxyapatite (MCHA) is a compound that normally makes up the crystalline matrix of bone and teeth and is the substance that gives them their rigidity. MCHA contains highly absorbable calcium and phosphorus, which are the major mineral components of bone. LuckyVitamin Bone Strength is a comprehensive bone support product with MCHA. It also provides magnesium and other important minerals, as well as vitamins C, D, and K to aid in the synthesis and maintenance of bone tissue. Supports Bone Health MCHA for Bone & Teeth Strength With Vitamins and Minerals for Comprehensive Support Free of Gluten, Dairy & Egg Superior QualityLuckyVitamin is proud to offer Full-Spectrum Multivitamins that have been independently audited for purity and strength.