This specialized shampoo, Kertyol Pso, is formulated by Ducray for targeted treatment aimed at keratin-prone scalp conditions. It functions to gently cleanse while aiding in the reduction of persistent scaling and flaking. Regular use helps to soothe the scalp environment and support the efficacy of subsequent dermatological treatments. Its formulation is designed for daily care or as part of a prescribed routine for chronic scalp irritation associated with excessive keratin buildup.