GLOSSARY : Sensitive and intolerant 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.
The epidermis, on the surface of the skin, is made of several layers. The deepest of these layers is called the basal layer. During the cell renewal process, the skin cells known as keratinocytes are renewed in the basal layer and then make their way up to the corneal layer.