Nioxin System 6 Scalp Treatment is designed for noticeably thinning and medium to coarse hair. This treatment contains botanicals and antioxidants that help to refresh the scalp and hair. System 6 scalp treatment is composed in such a way that it defends the scalp and hair from the DHT chemical and protect/strengthen hair. Nioxin System 6 Scalp Treatment is safe to use with all hair types and has been proven not to dull color in treated or normal hair.