A better life for sensitive skin

GLOSSARY : Signs of age, wrinkles, firmness

Your face skin

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.


Collagen is a fibrous protein in the dermal tissue. Its role is comparable to that of a support structure. When young, it is resistant and elastic. With age, its production decreases.