Prepare the scalp and hair for a complete hair thickening treatment with the NIOXIN 3-Part System 4 Cleanser Shampoo 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. Nioxins derma-purifying shampoo deeply cleanses the scalp and provides thicker, fuller-looking hair. Nioxins cleanser is the first step of a 3-part Nioxin treatment, designed to strengthen the hair and amplify hair structure.