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What do SPF numbers mean?

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Contents

UVB Absorption
Preventing Sun Damage

UVB Absorption

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Preventing Sun Damage

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Please copy/paste the following text to properly cite this HowStuffWorks.com article:

"What do SPF numbers mean?" 16 August 2007.
HowStuffWorks.com. <https://health.howstuffworks.com/skin-care/beauty/sun-care/spf.htm> 26 July 2024

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