Professional Formulas Osseous-Apatite Complex Microcrystalline-Hydroxyapatite from lyophilized calf bone tissue matrix. Recommended Dosage: As a nutritional supplement, take one capsule up to 4 times daily following meals, or as directed by your healthcare professional. Professional Formulas Osseous-Apatite Complex Facts: 1 capsule contains: Vitamin D3 (as cholecalciferol) 25 mcg (1000 IU) Calcium (from bone tissue matrix) 130 mg Phosphorus (from bone tissue matrix) 50 mg Molybdenum (as aspartate) 50 mcg Microcrystalline hydroxyapatite (bovine) 565 mg Horsetail (Equisetum arvense) Aerial Parts 50 mg Silicon (as amino acid chelate) 10 mg Boron (as aspartate) 200 mcg Vanadium (as aspartate) 75 mcg Other Ingredients: Organic brown rice, vegetarian capsule (hypromellose and water), vegetable stearate, and vegetable medium chain triglycerides.