The Nioxin Scalp + Hair Conditioner - System 1 is for those wanting to thicken natural, lightly thinning hair. This lightweight conditioner hydrates the hair and scalp while strengthening hair against breakage for thicker, fuller-looking hair. Clinically and dermatologically tested, Nioxin is designed to amplify hair texture and strengthen resilience for thicker, fuller hair.  Moisturizes Conditions Thickens Strengthens Who Is It For? Anyone with lightly thinning, natural hair What Does It Do? Thickens and strengthens hair Adds moisture How Do You Use It? After shampoo cleansing, massage onto scalp and distribute throughout the hair Leave on for 1-3 minutes, rinse well