Sunday, March 14, 2010

Skin, Vitamin D, Skin color, and Hair - How do they correlate?

If we need sunlight to produce vitamin D (and if we need vitamin D), and if our skin color changes according to climate to accomodate vitamin D production, then how do other mammals obtain their vitamin D (is it required?) with hair covering nearly all of the body? And, do other mammals skin change color according to climate (or more accurately...to the overall amount of sun exposure)?
Skin, Vitamin D, Skin color, and Hair - How do they correlate?
Other animals need Vitamin D, and energy and that good stuff too! But unlike humans... other animals dont hide from the sun in houses! Therefore they always receive Vitamin D, and are accumulated to their surroundings, therefore you don't see them change color, because they're use to this. Humans may be outside for a few hours, but this is not enough to make a steady color.
Skin, Vitamin D, Skin color, and Hair - How do they correlate?
Vitamin D is an indispensable vitamin. A lot of vitamin D can be found in food, not only from the sun. Eggs, fatty fish, grain cereals, even some types of mushrooms contain Vitamin D.





I don't think animals' skins change with sun exposure, but I am not sure, since most of them have scales/hair/feathers covering their skin.

nortin

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