The Nioxin System 4 Starter Set is designed to provide a complete care regimen for chemically treated hair that is visibly thinning. This multi-step system works to cleanse the scalp, optimize the hair environment, and deliver necessary nourishment to create fuller-looking hair. This set is ideal for individuals seeking to refresh and revitalize their scalp and hair density. Consistent use helps manage thinning hair by providing a foundation for healthier growth and improved hair texture.