Metagenics Bone Builder with Magnesium is a dietary supplement for bone health and strength support. This product is a complete bone nutrition formulation that has a complex crystalline compound, microcrystalline hydroxyapatite concentrate (MCHC), which offers everything found in healthy bones. It provides naturally occurring calcium, phosphorous, trace amounts of other minerals, collagen, vital bone proteins, and bone health factors. It includes vitamin D and magnesium for bone health and muscle relaxation support. Recommended use: Take 3 tablets, once daily or as directed by a healthcare professional. Metagenics Bone Builder with Magnesium facts: 3 Tablets contain: Vitamin D (as cholecalciferol) 600 IU Calcium (as MCHC and dicalcium phosphate) 620 mg Phosphorus (as MCHC and dicalcium phosphate) 350 mg Magnesium (as magnesium citrate, magnesium aspartate, and magnesium bis-glycinate) 300 mg Microcrystalline Hydroxyapatite Concentrate (MCHC) 1.5 g Other Ingredients: Microcrystalline cellulose, sodium starch glycolate, stearic acid (vegetable), silica, and coating (hypromellose, medium-chain triglycerides, and hydroxypropylcellulose).