I think the big question is does it matter outside of vitamin d deficiency. Severe vit d deficiency obviously is strongly negatively selective. So that by itse

I think the big question is does it matter outside of vitamin d deficiency. Severe vit d deficiency obviously is strongly negatively selective. So that by itself explains the evolution of white skin in northern climates. I dont think evolution can be used as evidence for other benefits, since vit d deficiency would cause that just by itself.