Nioxin System 1 Cleanser Shampoo is a hair care product that is designed to address thinning hair in individuals with natural, fine hair that has not been chemically treated. It is the first step in the three-part system, which also includes a scalp therapy conditioner and a scalp treatment. Nioxin System 1 Scalp Therapy Conditioner is a hair care product that is designed to work in conjunction with Nioxin System 1 Cleanser Shampoo to help address thinning hair in individuals with natural, fine hair that has not been chemically treated. It is the second step in the three-part system, with the first step being the cleanser shampoo and the third step being the scalp treatment.