News — sunscreen
How to Understand the Use of Sunscreen
No matter what the color of the sky is, whether bright blue or steely gray, the sun’s rays are raining down billions of photon particles per second on us. And, in addition to the warmth and light we crave, those kaleidoscopic rays contain ultraviolet (UV) radiation, the source of sunburn, premature skin aging and skin cancer, which more of us get than all other cancers combined. What SPF Ratings Mean SPF is a number that indicates how well a sunscreen shields unprotected skin from damage caused by a particular type of UV radiation: sunburn-causing, skin-cancer-promoting UVB rays. The scale isn’t...