Bone Builder® MBD 220 ct MCHC with Magnesium, Boron, and Vitamin D Bone Builder MBD is a comprehensive bone support formula that features the same calcium-rich MCHC found in original Bone Builder®, but with other bone-nourishing nutrients. Features a 2:1 ratio of calcium to magnesium. With more than one-half of the total body stores found in bone tissue, magnesium has been shown to play an important role in bone metabolism. Boron is a trace mineral that may support bone health through its involvement in vitamin D and estrogen metabolism. Vitamin D is an essential nutrient that helps stimulate calcium absorption and regulate calcium and phosphorus levels in the body. Two tablets supply: Vitamin D (as cholecalciferol).....................133 IU Calcium....................................................333 mg (as MCHC and dicalcium phosphate) Phosphorus..............................................197 mg (as MCHC and dicalcium phosphate) Magnesium...............................................167 mg (as magnesium citrate, magnesium bis-glycinate†, and magnesium oxide) Microcrystalline Hydroxyapatite...................1,050 mg Concentrate (MCHC)†† Boron (as boron citrate..............................200 mcg Other Ingredients: Microcrystalline cellulose, cellulose, croscarmellose sodium, stearic acid, silica, and coating (deionized water, microcrystalline cellulose, polyethelene glycol, and carrageenan). Recommendations: Two to six tablets daily. Form: 220 Tablet Bottles ††Microcrystalline hydroxyapatite concentrate supplies calcium,