Sunscreen, also known as sunblock, is a lotion, spray, gel, foam (such as an expanded foam lotion or whipped lotion), stick or other topical product that absorbs or reflects some of the sun‘s ultraviolet (UV) radiation and thus helps protect against sunburn. Diligent use of sunscreen can also slow or temporarily prevent the development of wrinkles, dark spots and sagging skin.
Medical organizations such as the American Cancer Society recommend the use of sunscreen because it aids in the prevention of squamous cell carcinomas.[2] The routine use of sunscreens may also reduce the risk of melanoma.[3] However, many sunscreens do not block UVA (UVA) radiation, yet protection from UVA has been shown to be important for the prevention of skin cancer.[4]
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