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With anti-dandruff efficacy for up to 3 weeks.* Contains Salicylic Acid for a breathable scalp & Piroctone Olamine to slow down the cell renewal of the scalp, preventing the formation of excess skin cells, dandruff, in the hair. *After 3 uses per week for 4 weeks. Key Ingredients: Salicylic Acid - Instantly peels visible dead skin cells for a breathable scalp Bifidus - Feeds the scalp good bacteria to prevent dandruff from reappearing and replenishes the hair fibre moisture Piroctone Olamine - Eliminates Malassezia bacteria, slows down the rate at which the cells renew, eliminating the process as to which dandruff is created.