José Ginestar is the scientific director of the luxury cosmetics brand Sisley. For 40 years, the firm has studied "a new vision of cutaneous ecology" The essential task of this cutaneous microbiota is to "limit the proliferation of harmful bacteria and promote the development of beneficial bacteria" Without healthy skin, we can do little for the rest of the problems of the face: wrinkles, spots, flaccidity...

We talked to Ginestor about 'The Strength' of our skin, and other hot topics at the skin level.