Prepare the scalp and hair for a complete hair thickening treatment with Nioxin\'s 3-part System 4 Cleanser for Coloured Hair with Progressed Thinning. Thanks to its Glyco-Shield technology, this professional hair product helps remove sebum, fatty acids and other environmental residue from the scalp and hair. Nioxin\'s derma-purifying shampoo deeply cleanses the scalp and provides thicker, fuller-looking hair. Nioxin\'s cleanser is the first step of a 3-part Nioxin treatment, designed to strengthen the hair and amplify hair structure.