Vichy Dercos Anti-Dandruff shampoo is a scientifically advanced formula with Selenium DS that gives you 100% visible dandruff elimination after the first use. It provides 6-week anti-relapse action which controls fungi and bacteria growth by rebalancing the scalp microbiome and restoring the skin's natural barrier. Your scalp will feel soothed and cleansed and the results are impressive; it prevents dandruff recurrence even 6 weeks after stopping the treatment. Benefits: Rebalances the scalp microbiome for a comprehensive solution to dandruff, eliminates 100% visible dandruff, intensely soothes itching, prevents dandruff recurrence up to 6 weeks after use.