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To help adolescents meet their increased RDA for calcium, the Healthy U.S.-Style Dietary Patterns indicate that adolescents should consume 2 cups of dairy foods.
What is the RDA of vitamin D?
Vitamin D is a substance that we need to eat, but our bodies also make it into a hormone. It has a long history of assisting the body retain and absorb calcium and phosphorus, both of which are necessary for bone formation. It is a fat-soluble vitamin. Additionally, laboratory studies shows that vitamin D reduces inflammation, controls infections, and slows the development of cancer cells. Vitamin D contains receptors in numerous physiological organs and tissues, suggesting that it may have important functions beyond bone health. Scientists are currently investigating new potential uses for this vitamin.
The daily dose of vitamin D provided by the Recommended Dietary Allowance for healthy persons helps them maintain strong bones and a regular calcium metabolism. It suggests limited solar exposure.
The recommended daily amount (RDA) for adults is 600 IU (15 mcg) for men and women, and 800 IU (20 mcg) for people over 70.
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