Many of us apply sunscreen to stave off sunburn and skin cancer. In what researchers are calling a first, a new study finds using sunscreen every day could significantly stall skin aging, also known as photoaging. And middle age isn't too late to start, the researchers found.

Daily sunscreen participants used products with a SPF of 15+ and applied it to their head, neck, arms and hands each morning after bathing, and every time they spent a few hours in the sun or sweated profusely. For four years, researchers calculated the daily sunscreen group showed 24 percent less skin aging than those who did not.

**FYI: According to the authors, sunscreens and antioxidants have long been touted to prevent skin aging, but no scientific evidence to date has shown they do.