Anti-Dandruff Shampoo exfoliates visible dandruff from the very first applicationThe Dercos Vichy Anti-Dandruff Shampoo exfoliates visible dandruff from the very first application and helps to prevent its return and reduces itchiness . Rich in selenium and Cohesyl, they help purify and calm the scalp. Remains efficient for up to six weeks after the treatment has been stopped.