This Nioxin Scalp + Hair Kit System 4 is specifically formulated for individuals experiencing visibly thinning and chemically treated hair. It provides a comprehensive, three-step solution designed to cleanse, condition, and treat the scalp and strands. System 4 is engineered to deliver thicker-looking hair by minimizing hair loss due to breakage and refreshing the scalp environment. Regular use helps control moisture balance, resulting in smoother, more manageable hair that feels fuller. Use the shampoo to deeply cleanse the scalp and hair, the conditioner to detangle and smooth, and the scalp treatment to optimize the environment for healthy hair growth.