e.g. has the hormone regulation & vit d synthesis benefits, without the skin damage?
Because it seems like we're getting there: https://www.sciencedaily.com/releases/2017/09/170913193101.h...
The reason that people are deficient is because they don't take enough - the US RDA was shown to be 10x too low, due to an arithmetic error in an ancient paper.
e.g. has the hormone regulation & vit d synthesis benefits, without the skin damage?
Because it seems like we're getting there: https://www.sciencedaily.com/releases/2017/09/170913193101.h...