The formulation features a high potency combination of bone-healthy calcium magnesium zinc and vitamin D. Calcium is the primary mineral responsible for bone strength magnesium and vitamin D are essential for proper bone mineralization and zinc is involved in the synthesis of collagen in bone tissue. Calcium (Calcium citrate Malate) 1000 mg Vitamin D3 200 IU Magnesium (as Magnesium Oxide) 100 mg Zinc (as Zinc sulphate) 4 mg Folic Acid 150 mcg