Designed for oily scalps prone to dandruff, the Kérastase Symbiose Purifying Anti-Dandruff Cellular Shampoo helps to cleanse and clarify the hair and scalp.The breathable foaming formula uses salicylic acid and piroctone olamine, which gently exfoliate to lift away dead skin cells, flakes and oil build-up. Ideal for even sensitive scalps, the shampoo leaves your scalp feeling soothed and balanced.In a clinical and self-assessment, 34 people during 4 weeks, 3 applications per week:• 97% agree it deeply cleansed their scalp• 97% agree that their hair felt healthy• 91% agree it was gentle on their scalp