Protect your Skin
Finding the Best Sunscreen will help shield you from the sun's dangerous ultraviolet (UV) rays in two ways. Some work by scattering the light, reflecting it away from your body. Others absorb the UV rays before they reach your skin. A few years ago, choosing a good sunscreen meant you just looked for a high sun protection factor (SPF) -- which rates how well the sunscreen protects against one type of cancer-causing UV ray, ultraviolet B (UVB.) "SPF refers to blockage of UVB rays only," says Leffell. Research soon showed that ultraviolet A rays (UVA) also increase skin cancer risk. While UVA rays don't cause sunburn, they penetrate deeply into skin and cause wrinkles. The Environmental Protection Agency estimates that up to 90% of skin changes associated with aging are really caused by a lifetime's exposure to UVA rays.