evidence: It turns out sunscreen does more than protect you from cancer and painful sunburns – it offers a boost to simple vanity. A new study finds that regular sunscreen use protects against photoaging: the wrinkling, spotting and loss of elasticity caused by exposure to the sun’s ultraviolet radiation. [...] More than 900 participants were followed for four years. Some were told to use sunscreen daily and instructed in proper use, including re-applying sunscreen after being outside for a few hours, after going in the water or after sweating heavily.