Dercos Technique Anti-Dandruff DS Normal to Oily Hair Dermatological Shampoo acts on visible dandruff and helps to balance the microbiome (set of microorganisms that reside in the hair follicle and scalp) .from the 1st use. It has a proven anti-relapse action for 6 weeks, controlling dandruff and providing lasting comfort. It works by eliminating dandruff, even on the sensitive scalp, leaving it purified and clean. Selenium Disulfide is an antifungal agent, and a cytostatic agent, used to slow the growth of hyperproliferative cells in seborrhea. Salicylic Acid promotes the elimination of dead cells and the renewal of the epidermis (keratolytic action).