Nioxin is a professional hair care brand which specialises in treating thinning hair. Using advanced technologies, Nioxin hair products help deliver thicker, fuller and denser looking hair. The brand all started when Eva Graham experienced hair loss after this birth of her child, and began to explore the idea of using skincare methods to treat it. New to Nioxin? We recommend using the System Kits. The best-sellers are System 3 which is for thin, chemically treated hair and System 2 which is for natural, noticeably thinning hair.