Nioxin Research Laboratories is a manufacturer of hea and scalp cleansers, conditioners and treatment systems. Nioxin products are sold primarily by professional salons and are typically marketed to people with thinning hair or baldness problems. The company is based in Lithia Springs, Georgia, a suburb of Atlanta. Nioxin products make up one of the primary product lines carried by Regis Hair Salons, the largest chain of hair salons in the United States.