Nioxin system 4 scalp and hair treatment is a leave in conditioning product formulated for use on chemically treated hair using its unique dual protection technology along with natural herbs and botanicals this treatment will moisturise the scalp and guard it from chemical service residues fragrance direct customers are loving the nioxin range of hair care products that we have on offer and this nioxin system 4 scalp and hair treatment is a popular purchase as it helps to promote a hea