This Nioxin System 4 Shampoo is specially formulated for clients with prominently thinning, chemically treated, or moderately damaged hair. It works to cleanse the scalp and hair, removing product buildup, sebum, and environmental residues that can clog follicles. This advanced formula helps to refresh the scalp environment, providing denser-looking hair while strengthening the hair structure against breakage caused by chemical processes. Regular use supports the optimal foundation for healthy hair growth.