Product Description Nioxins cleanser shampoo System 4 for colored hair with progressed thinning is the first step of athree part Nioxin regimen, specially formulated to strengthen the hair and amplify hair structure. It prepares the hair and scalp for a complete hair thickening treatment with Nioxins three part System 4. This professional derma-purifying, color-safe Cleanser Shampoo removes dirt, excessive oil and other environmental residues from the scalp and hair. Features & Benefits Cleanses dry scalp and colored hair for thicker, fuller-looking hair. Removes follicle clogging sebum, fatty acids and environmental residues from hair and scalp. Peppermint oil refreshes the scalp from FIRST USE. Color safe shampoo. Nioxin System Kit is designed to strengthen the hair and amplify hair structure.