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Calcium and calcium supplements: Achieving the right balance

Calcium and vitamin D

To absorb calcium, your body also needs vitamin D. Some foods naturally contain small amounts of vitamin D, such as canned salmon with bones, tuna and egg yolks. You also can get vitamin D from foods fortified with the vitamin. The recommended amount of vitamin D for most adults is 600 international units or 15 micrograms a day. Spending time in the sun also helps the body make vitamin D, even when you wear sunscreen.