I don't want to dig out the reference, but it seemed pretty credible when I read it. It states that while it is true that people exposed to the sun get skin ca

I don't want to dig out the reference, but it seemed pretty credible when I read it. It states that while it is true that people exposed to the sun get skin cancers more often, their outcomes are also usually far better. So are their outcomes to all other forms of cancer. Thus, overall, the benefits are substantial. This is not to say you should go out and lay in the sun for hours and get your skin dark brown - instead, it is about not being afraid of normal and regular sun exposure. It is good for you. Things that mildly damage cells are not necessarily bad for you. They trigger apoptosis, a renewal of these cells. This is why fasting is beneficial, why exercise is beneficial, and why challenging your cells is beneficial. Many of the famous mud and water treatments that help arthritis have waters that are ever so slightly radioactive (well within safe limits but far higher than normal background radiation) for example. You get new and more resilient, and better cells.