Is there a term from the field of dermatology and cosmetics that you do not understand? Would you like to know what it means? View the full definition from the La Roche-Posay glossary.
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Your face skin
In contrast to UVA and UVB radiation, UVC does not reach the surface of the earth: the atmosphere absorbs 99% of it. UVC rays play a role in the production of the ozone layer.