evidence: The sun releases ultraviolet (UV) radiation, which provides vitamin D to your body. But too much sun exposure can cause wrinkles and skin cancer. You can protect your skin from too much UV exposure by wearing sunscreen when you go outside. Skin cancer from UV radiation is treatable and leads to a good prognosis if detected early. [...] The UV energy that the sun produces reaches the Earth and provides vitamin D for your body to help you survive. You can also find UV radiation in human-made sources like tanning beds. Exposure to too much ultraviolet radiation greatly increases your risk of developing skin cancer. [...] Ultraviolet (UV) radiation is necessary because it provides vitamin D to help you survive, but it’s also harmful with overexposure. You can take care of your skin and prevent skin cancer from ultraviolet radiation by wearing sunscreen outdoors and staying out of the sun when it’s at its brightest in the middle of the day. Nearly 80% of a person’s lifetime sun exposure occurs before age 18. You can become a good role model and foster skin cancer prevention habits for your family by taking preventive measures when you go outside.