As a official member of the "old fart" society I have a memory of something from 50ish years ago, probably in Time magazine, that documented the fact the US mil

As a official member of the "old fart" society I have a memory of something from 50ish years ago, probably in Time magazine, that documented the fact the US military found cases of rickets associated with low vitamin D levels in personnel stationed at the DEW (Distant Early Warning) line, a group of radar stations in the high arctic. The cases were among people with darker skin. So there's some old evidence correlating Vitamin D, skin shade and sunlight exposure. Wish I could remember the source...