THEY WEAR SUNSCREEN
SPF 30 or more, specifically. “Blistering sunburns between age 15 and 20 increase the risk of malignant melanoma by 80 percent and other cancers by 68 percent,” says Delphine Lee, M.D., a dermatologist at the John Wayne Cancer Institute in Santa Monica, California. Be sure to reapply every two hours when you’re outdoors.