Just to play it super safe, before taking this for granted, I'd like to have this backed-up by either a JG or a HP, since we're talking about Health.
My father has been sunbathing every chance he had, for all his life, and despite being unhealthy in other things (like smoking cigarettes) he's has always been in tip-top shape even in his 40s, so I'm not against this notion, I, on the other hand, have never liked to stay in the Sun long, and would you look at that, I get sick much more often that my father, who almost never gets sick.
I'm in the mindset of moderation, I know for a fact I don't take enough sunlight (because I have a lack of Vitamin D, to the point I've got to take supplements), but I don't know if continued and relentless exposure is good, as almost all in Life seems to be best when moderated, never too much, never too little.