Kertyol PSO shampoo was designed to regulate all the factors responsible for flaky scalp conditions. Kertyol PSO Shampoooing Keratin-regulating Shampoo for Removing Dandruff Keratin regulating, removes adherent scales and calms redness. Kertyol shampoo was created to address all the factors responsible for dandruff. The Kertyol complex is a combination of active ingredients patented by Pierre Fabre, which reduces itching and redness quickly and durably. Salicylic acid helps to remove scales from the scalp. Its gentle cleansing base, rich in piroctone olamine, cleanses, complements the action, gently cleanses and gives shine to the hair. Kertyol shampoo is pleasant to use and has a distinctive fragrance. The effectiveness of Kertyol has been confirmed by numerous clinical studies.