People living closer to the equator have lower rates of autoimmune diseases, potentially linked to vitamin D levels.

“interestingly a there's lots of epidemiology that observational studies to suggest that people who grow up closer to the Equator have lower rates of autoimmune disease we see this trend very clearly with things like multiple sclerosis but also with other autoimmune diseases so could this possibly be connected with vitamin D levels could this possibly be connected with other programming that's going on in our bodies with real sunlight exposure I think it's quite intriguing a hypothesis”