The Nutritive 8H Magic Night Serum from Kérastase is a magical treatment that transforms dry, limp hair into a shiny, silky mane overnight It promotes hair regeneration and provides it with valuable nutrients. It intensively conditions and detangles the hair for up to 8 hours. It penetrates deep into the hair structure and floods it with moisture. In the morning, you can look forward to smooth, healthy-looking and shiny hair.