Vitamin deficiency is a big one.

"Vitamin D deficiency may accelerate age-related cognitive decline."

https://www.pnas.org/doi/10.1073/pnas.1404477111#:~:text=Vitamin%20D%20is%20an%20important,accelerate%20age%2Drelated%20cognitive%20decline.

"Some people may need more sun exposure because they have darker skin, which takes longer to generate vitamin D."

https://lloydspharmacy.com/blogs/vitamins-and-supplement-advice/vitamin-d-for-skin-types-and-ages#:~:text=Some%20people%20may%20need%20more,is%20more%20sensitive%20to%20burning.

We already know vitamin D deficiency causes exactly this health outcome. To not control for it before declaring "Racism did it" is ridiculous.

Different skin colors didn't arise for no reason. Europeans turned white and East Asians lighter skinned because it's best suited to the environment of the northern hemisphere and the ones who didn't died early and were less fit for survival and so on.

That didn't magically stop being true when we decided the races were equal.

Black people need vitamin D supplements or to ensure their diet has steady sources of it, or to go sunbathing a few times a year, or they're going to end up with a deficiency which causes all kinds of issues including faster brain aging and cognitive decline. That is, unless they live in a sunny clime with low cloud coverage.

This study is like looking at higher skin cancer rates for white people living in africa than black people, and going "It's racism doing it.".

Oh really now. Is it.