Vitamin D aids in the absorption of calcium. Aging significantly
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.
Caltrate with vitamin D contains: 600 mg of calcium carbonate (elemental calcium), 200 IU of vitamin D (cholecalciferol) per tablet