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vitamin deficiency

09/30/2016 / By Greg White

Top 10 natural food sources of immunity-boosting vitamin D

Vitamin D is one of the most extensively studied nutrients. Contrary to popular belief, vitamin D is not, well, a vitamin. The body can produce its own vitamin D, so it is technically a hormone. The primary source of vitamin D is sunlight. When skin cells are exposed to sunlight, a molecule in the skin […]

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