Everything in moderation they say, and sun exposure is no exception. Here is a general overview of the pros and cons of sun exposure, but remember, your individual risk factors need to be considered. Benefits: 1. Vitamin D production - this begins when UV rays hit our skin, and then there are a series of reactions involving the kidneys and liver to make active form of Vitamin D. Note- aging, increased cutaneous fat, skin coverage from clothing, darker skin, liver or kidney is