Nioxin System 3 Loyalty KitDescription How to Use Ingredients A 3 step professional system including a shampoo, conditioner, and leave on treatment, clinically designed to target light thinning for colour treated or dry, damaged hair. Why you'll love it: System Kit 3 delivers essential nutrients and antioxidants to the scalp, nourishing and protecting it against damage. Clinically and dermatologically tested, to deliver more thickness, fullness, and density in 30 days.