Calcium 500 mg (algae Source) and Vitamin D3 200 IUCalcium Preparations (Calcium Preparations) Indication: Calcium and Vitamin D3 is used for the treatment of:• Osteoporosis• Osteomalacia• Rickets• Tetany• Parathyroid disease Dosage & Administration: One tablet in the morning and one tablet at night. Preparation: 30 tablets in double layer HDPE container.