L’Oréal Professionnel Serie Expert Serioxyl Shampoo for Coloured Hair cleanses the scalp of impurities while densifying the hair. This hypoallergenic shampoo is suitable for those with sensitive scalps as well as colour-treated hair. Born from 10 years of research, the Serioxyl line offers professional care routines for hair lacking density. Formulated with Polysorbate 21 and Magnesium Sulfate for their soothing and bodifying properties, this daily shampoo will prevent colour-fade while giving you a thicker, fuller-looking head of hair.