![]() In general, adults should consume 600 international units of vitamin D a day. Chemical reactions in your liver and kidneys transform vitamin D into forms that your body can use. People in climates with more sunlight tend to get more exposure than do those in climates with less sunlight.Ĭertain foods - fortified foods, such as milk and cereal, and fatty fish, such as salmon, tuna and mackerel - also provide vitamin D. ![]() When ultraviolet (UV) rays hit your skin - particularly midday - it triggers production of vitamin D. You get most of your vitamin D from sunlight. ![]() It does this by helping your body absorb and maintain adequate levels of two other nutrients important to bone health - calcium and phosphate. Why is it so important, and does the average person need a vitamin D supplement?ĪNSWER: Vitamin D is an essential nutrient that your body requires primarily to build strong bones. DEAR MAYO CLINIC: It seems that vitamin D is always in the news.
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