In adults, a vitamin D deficiency may ( 17, 18, 19): In that case, you may need to rely on your diet (or supplements) for vitamin D as well as on vitamin D that’s stored in body fat ( 15). The levels may go down during the winter months due to a lack of sufficient sunlight ( 15, 16). However, if you live far north or south of the equator, your vitamin D levels may fluctuate depending on the season.
If you have access to strong sun all year, then occasional sun exposure may be enough to fulfill your vitamin D requirements. However, this rate rises to 82% in Black people and 70% in Hispanics, which systemic problems likely play a role in ( 5).
However, it’s pervasive in young women, infants, older adults, and people who have dark skin ( 12, 13, 14).Ībout 42% of the U.S. Vitamin D deficiency is a problem all over the world.
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