Step one of NIOXIN 3-Part System 5 Kit is a Cleanser Shampoo designed for Chemically Treated and Bleached Hair with Light Thinning as the first step of a 3-Part System Kit regime. It performs a deep cleanse, removing dirt, sebum and other impurities from the scalp and hair to make way for healthier, thicker and fuller looking locks. Formulated with Activ-Renewal™ technology, the Cleanser Shampoo helps to strengthen hair structure, leaving locks looking healthy and amplified. Best results achieved when using all 3 steps together. Nioxin is the N°1 Salon Brand for thicker and fuller looking hair with more than 35 years expertise in thinning hair.