Nioxin Pro Clinical's System Kit 2 is designed for natural, untreated hair with progressed thinning. Clinically and dermatologically tested. Nioxin System Kit 2's hair thickening treatment delivers essential nutrients, antioxidants, and botanicals to the scalp, nourishing and protecting it against damage. It also helps to refresh the scalp and increase the volume of every strand, leaving your hair looking fuller and thicker. This treatment contains UV protecting ingredients for the scalp and hair. To use, apply Nioxin System 2 Scalp + hair thickening Treatment to towel-dried hair, focusing on the scalp and areas of concern. Massage gently to ensure even distribution. Do not rinse out. Style as desired. For optimal results, use alongside Nioxin System 2 Scalp + hair Shampoo and Conditioner.