Effect of vitamin D supplementation on non-skeletal disorders: A systematic review of meta-analyses and randomised trials. National Institutes of Health Office of Dietary Supplements. Vitamin D fact sheet for health professionals.Department of Health and Human Services and U.S. 2015-2020 Dietary Guidelines for Americans.The problem is, too many people think that using sunscreen and other forms of sun protection leads to vitamin D deficiency, and that the best way to obtain enough of the vitamin is through. Dietary Reference Intakes for calcium and vitamin D. The sun’s ultraviolet B (UVB) rays interact with a protein called 7-DHC in the skin, converting it into vitamin D3, the active form of vitamin D.If you're concerned about whether you're getting enough vitamin D, talk to your doctor about your diet and whether a vitamin supplement might benefit you. In fact, too much vitamin D has been linked to other health problems. Very high levels of vitamin D have not been shown to provide greater benefits. For example, choose fatty fish, such as salmon, trout, tuna and halibut, which offer higher amounts of vitamin D, or fortified foods, such as milk and yogurt.ĭon't overdo it, though. To meet this level, choose foods that are rich in vitamin D.
That goes up to 800 IU a day for those older than age 70. The Recommended Dietary Allowance (RDA) for adults is 600 international units (IU) of vitamin D a day. However, some groups - particularly people who are obese, who have dark skin and who are older than age 65 - may have lower levels of vitamin D due to their diets, little sun exposure or other factors. For most adults, vitamin D deficiency is not a concern. Although the amount of vitamin D adults get from their diets is often less than what's recommended, exposure to sunlight can make up for the difference.
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