A purifying shampoo for natural hair with light thinningWorks as the first hair care step of the 3-Part treatmentHelps strengthen hair structure to prepare scalp & hair for a full thickening treatmentContains active renewal technology to remove sebum, fatty acids & dirt from scalp & hair Nioxin NIOXIN - Derma Purifying System 1 Cleanser Shampoo (Natural Hair, Light Thinning) 1000ml/33.8oz.