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Vitamin D absorption for different skin types

Human Anatomy, Physiology, and Medicine. Anything human!

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Vitamin D absorption for different skin types

Postby Piggis » Tue Jul 08, 2014 10:29 pm

Earlier i was reading an article and which mentioned how people with lighter skin synthesise vitamin D from the sun more easily than people with darker skin tones. I tried to look into this but i couldn't find an answer so i thought somewhere like here would be a good place to start. So my question is if people with lighter skin can synthesise vitamin D more easily, does this mean that people with darker skin are more susceptible to depression from vitamin D deficiency, or do people with darker skin naturally have a higher amount in their system to begin with?
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Re: Vitamin D absorption for different skin types

Postby Darby » Tue Jul 15, 2014 7:39 pm

This seems to be an area that is just beginning to draw research interest.

Darker skin evolved in high light-exposure populations to protect deeper skin layers from UV damage, but tones lightened in pops with lower exposure, to allow enough UV to reach the D-generating skin tissues. Dark-skinned people in lower-light areas almost certainly need D supplements (or extra UV exposure, which has some downside) of some sort. They don't make D another way.
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