Discover the Kérastase Symbiose collection with the Anti-Dandruff Cleanse and Treat Duo for Oily Scalps. Powered by exfoliating actives, the duo is suitable for those with oily scalps prone to dandruff and build-up. Set Contents: Purifying Anti-Dandruff Cellular Shampoo 250ml Designed for oily scalps prone to dandruff, the shampoo uses salicylic acid and piroctone olamine to gently exfoliate dead skin cells and oil build-up. Symbiose Intensive Anti-Dandruff Cellular Night Serum 90ml A night-time hair and scalp serum formulated with salicylic acid to gently exfoliate dead skin cells and leave your scalp feeling nourished and clarified.