Nioxin System 6 Scalp Therapy Revitalizing Conditioner Step 2 – 150 mL Description: Nioxin System 6 Color Safe Scalp Therapy Revitalizing Conditioner, 150 mL. Designed for chemically treated hair with progressed thinning, this Step 2 conditioner helps moisturize and condition the scalp and hair while supporting a fuller, healthier-looking appearance. Great for color-treated hair.