http://en.wikipedia.org/wiki/Michael_F._Holick
Don't say I ain't warn you.
Especially during the winter.
He TOLD ME specifically that of melanin need 10x more sunlight than whites and nearly 15x as much vitamin d to get the same effect as non-whites.
Studies on young teens in georgia found that damn near 90% of them were Vitamin D deficient.
Take supplements! Go outside!
oh...and theres a crap load of biochemistry involved backing this up so don't throw me in the alex jones camp. I just feel like simplifying this as much as possible.
TL;DR: Vitamin D will help blacks to age better and avoid long term health problems.
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