Your interpretation of said articles, is wrong.
The point is simple:
1. Black people are vitamin D DEFICIENT en masse
2. More UVB exposure is needed for blacks to produce endogenous D3.
3. I dont want to start dropping unnecessary credentials on here, but its clear you aren't aware of where you're wrong about this stuff because you haven't the slightest clue of how this works.
I'm starting to think you are bullshytting about what you do, because you linked an article(which I was the first to post on this forum, btw) that clearly states what it means, and you still came up with what you want to see. Quote from the article, that YOU LINKED:
"The 25-hydroxy form is tightly bound to a protein, and as a result, bone cells, immune cells and other tissues that need vitamin D can't take it up. It has to be converted by the kidneys into a form called 1,25-dihydroxyvitamin D.
For Caucasians, blood levels of 25-hydroxyvitamin D are a pretty good proxy for how much of the bioavailable vitamin they have. But not for blacks.
That's because blacks have only a quarter to a third as much of the binding protein, Thadhani says. So the blood test for the 25-hydroxy form is misleading. His study finds that because of those lower levels of the protein, blacks still have enough of the bioavailable vitamin, which explains why their bones look strong even though the usual blood tests say they shouldn't.
"The conclusion from this study is that just because your total levels are low, it doesn't mean we need to replace vitamin D" using supplements, Thadhani says. The study was published Wednesday in the New England Journal of Medicine.
Again, YOU linked the article









