From the ManufacturerCaltrate 600+D contains 600 mg calcium plus 400 IU of vitamin D per tablet. Vitamin D aids in the absorption of calcium. Aging decreases the capacity to produce vitamin D, so adults over the age of 65 are particularly susceptible to vitamin D deficiency. You may also be at risk if you do not consume dairy products, since most consumption of vitamin D comes from fortified milk and cereal products. SUGGESTED USE:Take one tablet twice daily with food or as directed by your physician. Not formulated for use in children.As with any supplement, if you are pregnant or nursing a baby, contact your healthcare professional. INGREDIENTS: Calcium Carbonate, Maltodextrin. Contains less than 2% of the following: Cholecalciferol (Vit. D), Croscarmellose Sodium, FD&C Blue No. 2 Aluminum Lake, FD&C Red No. 40 Aluminum Lake, FD&C Yellow No. 6 Aluminum Lake, Glycerin, Medium-Chain Triglycerides, Mineral Oil, Modified Corn Starch, Polyethylene Glycol, Polyvinyl Alcohol, Silicon Dioxide, Sodium Ascorbate Sucrose, Talc, Titanium Dioxide, Tocopherols.