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Perhaps not have > 50 ng of vitamin D due to need to avoid sun damage

Monday January 14, 2013

Hypothesis: Humans did not evolve to having >100 ng of vitamin D due to skin damage

It seems that the higher the level of vitamin D the better.
So VitaminDWiki was wondering why evolution results in > 100 ng of vitamin D
A possible solution: When getting > 50 ng of vitamin D from the sun there is a danger of damaging the skin,
so the body developed a method of limiting skin damage by darkening the skin.
Darkening of the skin is a good trade-off to make vs the benefits of vitamin D when the sun was the only source of vitamin D.

This was appended to Is 50 ng of vitamin D too high, just right, or not enough Jan 14, 2013