Symbiose Serum Cellulaire Nuit Anti-Pelliculaire Intensif by Kérastase is a night serum for sensitive scalp, with all types of dandruff. It contains no sulfate and no silicon. The serum is enriched with salicylic acid for a breathable scalp, piroctone olamine that acts on all the causes of dandruff and bifidus, for a healthier scalp, with no more flakes. The Symbiose serum helps to eliminate dandruff at the source with its 8H continuous action at night, which is the most regenerative scalp moment. This non-sticky and non-greasy formula soothes scalp irritations & discomforts for less sensitivity(1) of the scalp. The scalp is preserved(2). Up to 7 weeks of anti-dandruff efficacy(2). Symbiose Night Serum has a translucent to milky serum gel texture combined with a luxurious fine fragrance. (1)Consumer test, 81% of consumers agree (2) Clinical study on 37 people after 4 weeks of use