Sunscreen and Sunblock
Sunscreen and Sunblock Facts
History of Sunscreen
Originally sunscreens were looked upon as preventatives for sunburn. Over the last 50 years, our understanding of the negative effects of ultraviolet light has evolved. It was believed that the sun was beneficial for skin, producing a darker coloration and an enhanced feeling of vitality. Now it is known that extended exposure to sunlight has very limited beneficial effects and will cause wrinkling and produce mutations that predispose to almost all cases of skin cancer.
How Does Sunscreen Work?
Sunscreens work by absorbing or reflecting ultraviolet light so that it does not reach the living cells of the skin or the deeper, collagen-rich dermis.
Medically Reviewed by a Doctor on 1/28/2016
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Sunscreen -- User Experience
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