Yeah, I remember that they said if we took more than 400 U a day it could be toxic! Now they are encouraging so much!! Wow, things sure change...that's why it gets harder and harder to believe what you hear/read as you get older...you've heard so many things.
But to me it makes sense that we were meant to be outside. Because of what man has done to the ozone layer I can also understand trying to stay inside during the hottest parts of the day, but to use sunscreen ALL the time and to avoid ALL sun does not make sense to me either. Well, I'm sure getting my fair share recently since my dh depends on me to do the yard work! I am quite light skinned and do get those ugly blotches when in the sun and have been concerned about skin ca, but yet I forget my sun screen. So I just go out and get a little Vit D and then go inside during the hottest parts of the day. I never used to like being in the sun but these days I am really enjoying it...it feels like a nice warm sauna...
ETA: Those of you who have read what the Braggs (father (now deceased) and dd) say...they always said to enjoy the sun. They have some strange (to me at least) ideas but who knows some of the others might be right too.