Uriah

Iceland is almost in the Arctic Circle and yet their schizophrenia prevalence is actually lower than the European average because they eat even more fish than the Japanese.

Finns have consistently the highest schizophrenia rates of any European people because they live so far north and yet, unlike the Scandinavians, they stupidly don't eat fish.

Everybody living that far north in cities goes nuts except Scandinavians. Helsinki is further north than Oslo and yet whatever study you look at, fish is only eaten at 1/3rd to 1/2 the rate in Finns vs Norsk