Woman applying sunscreen

Photo: Jamie Grill/Getty Images

3 of 8
Slather on SPF

You may be tempted to spend hundreds on pricy anti-aging creams, but a consistent application of sunscreen is more important. Middle-aged adults who used it daily had skin that was 24 percent younger compared to those who wore it less consistently, according to a randomized trial in the Annals of Internal Medicine. "Sunscreen helps prevent damaging UV rays from degrading collagen and causing wrinkles and sunspots," says Adarsh Vijay Mudgil, MD, medical director of Mudgil Dermatology and clinical assistant professor at Icahn School of Medicine at Mount Sinai in New York City. No matter the weather—overcast, snowing, raining—apply a broad-spectrum SPF 30.