"What’s the difference between sunscreen and sunblock?"
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Sun protection factor (SPF) represents a sunscreen’s ability to shield against the sun’s UVB rays. For best coverage, use broad-range sunscreens that protect skin from UVA and UVB rays. Topical sunscreens can be classified into two groups: chemical absorbers and physical blockers (formerly called “sunblocks”). Chemical sunscreens work by interacting with the skin’s top layer to absorb UV rays and convert the rays into energy before they can harm skin. Physical blockers work by sitting on top of the skin and will either reflect or scatter the UV radiation. In reality, both terms are used interchangeably, however, the term sunblock is deemed somewhat misleading so it is not used as much today.

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