Prepare the scalp and hair for a complete hair thickening treatment with Nioxin's 3-part System 1 cleanser for natural hair with light thinning. This professional hair product's Activ-Renewal technology helps remove sebum, fatty acids and other environmental residue from the scalp and hair. Nioxin's purifying shampoo deeply cleanses the scalp and provides thicker, fuller-looking hair. Nioxin's cleanser is the first step of a 3-part Nioxin regimen, designed to strengthen the hair and amplify hair structure. | Nioxin System 1 Cleansing Shampoo, 16. 9 oz | Dermstore