Nioxin’s System 2 Cleanser Shampoo for natural hair with progressed thinning is the first step of a 2 part Nioxin regimen, specially formulated to strengthen the hair and amplify hair structure. It prepares hair and scalp for a complete hair thickening treatment with Nioxin’s System 2 Conditioner. This professional derma-purifying Cleanser Shampoo removes dirt, excessive oil and other environmental residues from the scalp and hair.