Peels, very frequently achieved in cosmetic medicine, are one of the pillars of dermo-aesthetic treatment of the skin. The chemical agents used enhance the cutaneous texture and eliminate imperfections. Photo-aging causes structural damages to the skin with a diminution of dermic volume, a breaking of the elastic fibres, a formation of elastosic bumps, a diminution of reticular fibres and a vacuolization of the epidermis. Peels cause an exfoliation of the skin, thus helping the cellular renewal. They also stimulate the cells that create the derm with an effect on it : augmentation of the glycosaminoglycans, change in the quality of collagen resulting in dermic thickening.