What Happens in the Sun
When light hits the skin, it creates free radicals that attach themselves to important cellular proteins and DNA, ultimately causing collagen damage. When skin darkens or turns red, it means that there has been an inflammatory response at the cellular level. The result? Uneven pigmentation, dark spots, wrinkles, rough skin, and sometimes, skin cancer.
Get sun smart, with these sunscreen facts:
 24% of signs of aging are reduced by regular sunscreen use.
 Only sunscreens with SPF 15 or more can reduce the risk of sun cancer and early aging.
 47% of sun aging occurs between ages 19 and 40. Not only can you help stop your accumulation today by applying sunscreen, but you can also help lessen the effects of past sun damage by doing so.
 All sunscreens labeled broad-spectrum are proven to protect skin from UVB (skin-burning) and UVA (aging and cancer-causing) rays.
 Water and sweat-resistant sunscreens must be effective for 40 or 80 minutes during swimming or sweating based on tests (Bonapiel's are 80 minutes).
 Over 40% of the sun’s harmful UV rays can still penetrate through the clouds and ultimately to you.
 The basic rules of math don’t apply to SPF numbers. SPF 15 blocks 93% of UVB rays, SPF 30 stops about 97%, and SPF 50 obstructs 98%.
Source: Skin Cancer Foundation, New England Journal of Medicine, Annals of Internal Medicine, and The American Cancer Society.