There are two types of UV light that can harm skin — UVA and UVB rays. UVA rays also called “aging rays” cause premature aging, sunspots, hyperpigmentation and wrinkles. UVB rays called “burning” because they cause sunburn. Both UVA and UVB can cause cancer. That why we need protection from both types of UV rays. Broad-spectrum, or full-spectrum, sunscreen protects you from both.
UVA rays can prematurely age your skin, causing wrinkling and age spots. UVB rays can burn your skin. Too much exposure to UVA or UVB rays can cause skin cancer. The best sunscreen offers protection from all UV light.