The Nioxin 3-Part System 5 Cleanser Shampoo for Chemically Treated Hair with Light Thinning is the first step in a tri-phase routine, designed to amplify hair structure. The shampoo is specifically formulated for bleached or chemically-treated hair, working to deeply cleanse and strengthen strands.Powered by Glyco-Shield 2.0 technology, the derma-purifying shampoo helps to remove sebum, fatty acids and other environmental residue, prepping your hair and scalp for the subsequent steps of the treatment. Hair is left feeling refreshed with enhanced resilience.