Yellow peel is a progressive peel, whose effect depends on the number of applied layers within a few hours after the treatment microcirculation increases, oxygen supply to the skin improves and supply of nourishing substance take place. Yellow peel stimulates through retinoic acid. Its include phytic acid, kojin acid and azelaic acid. It also acts as a blockade ofendogenic melanin synthesis, while removing existing discolourations and preventing the development of new ones.