dark-skinned people are more likely to suffer vitamin D3 deficiency because their melanin blocks much more of the sun's light, especially when living away from the equator where the sun's UV radiation is greatly reduced, and are more likely to need supplementation to remain healthy

Oh yes and this was mentioned by good caring doctors regarding COVID. Given the lack of interest in early treatment before the injection was available, Vitamin C , D3, and zinc where the tools we the public had available to us. I saw much advice for dark-skinned folks about D3 supplements due to exactly what you said here.

I also agree with you that discussing differences between folks is not racist, sexist or any other ist. It's simply a fact of life here on Earth.