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Winter Solstice, Christmas, and The New Year

By Dr. James Dowd

Vitamin D production requires ultraviolet B spectrum light (280-315 nm wavelength). Cholesterol from our diet and that produced in our liver is modified then transported to the skin where it is stereochemically altered by UVB light and heat, returned to the liver and further modified to 25-hydroxy … [Read more...]

Filed Under: Sun, Sunscreen, UVA, UVB, Vitamin D Tagged With: bathing suit, Christmas, Cold, Coldest Day, New Year, Shortest Day, swimsuit, Warm, Winter Solstice, Winter Vacation

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