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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Firmness is one of the defining characteristics of youthful skin. It is provided by the dermis, which acts as a cushion for the skin, and its collagen and elastin fibres. When young, the skin is firm and toned. With age, the dermal cells deteriorate and the fibres become looser: the skin loses its firmness.

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