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 and other environmental residue, prepping your hair and scalp for the subsequent steps of the treatment. Hair is left feeling refreshed with enhanced resilience.