Vitamin D supplementation may not be the entire answer. We tend to
think of the effects of vitamin D being due to either sunshine through the skin or by a pill, but there also is an effect of sunshine through the eyes that is conducted to the pineal gland, affecting some hormonal levels, that may be just as important.
We may need to not only get sunshine through the skin, but through the eyes.
http://www.springerlink.com/content/n500596240235mw0/
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