For now, anyway.
- David Gutierrez
Doctors are becoming increasingly concerned about growing rates of vitamin D deficiency, leading many of them to recommend that people get more sun or even take supplements.
Vitamin D has long been known to play an important role in bone health. Deficiency can lead to osteoporosis in adults, and in children and some adults can lead to a bone-softening disease known as rickets.
Although the vitamin is synthesized by the body upon exposure to sunlight, people living far from the equator can have trouble producing enough of it in the winter time. For this reason, numerous governments began fortifying dairy products with vitamin D decades ago, leading directly to a near-elimination of rickets. The disease is starting to make a resurgence, however, even as researchers start to believe that humans may need higher levels of the vitamin than previously thought.
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