Prepare the scalp & 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 & other environmental residue from the scalp & hair. Nioxin’s derma-purifying shampoo deeply cleanses the scalp & provides thicker, fuller-looking hair. Nioxin’s cleanser is the first step of a 3-part Nioxin treatment, designed to strengthen the hair & amplify hair structure.