A 3-step professional system including a shampoo, conditioner, and leave-on treatment, clinically designed to target progressed thinning for natural, untreated hair. The Scalp + Hair Thickening Treatment contains UV protecting ingredients for the scalp and hair. System 2 delivers essential nutrients and antioxidants to the scalp, nourishing and protecting it against damage. Clinically and dermatologically tested, delivering thicker, fuller hair in 30 days. Formulated with powerful ingredients like niacinamide, wild mint oil, peppermint oil, and caffeine. THICKENS HAIR: clinically designed to add thickness and fullness to natural hair with progressed thinning, with visible results in just 30 days. SUPPORTS SCALP HEALTH: advanced formula gently cleanses the scalp, removing impurities and excess sebum that can clog hair follicles, creating a healthier environment for the scalp. REDUCES HAIR THINNING: helps minimize hair breakage, promoting the appearance of fuller, thicker hair. NOURISHES THE SCALP: infused with nourishing ingredients, antioxidants, and UV protecting ingredients, the kit includes Nioxin Leave-In Treatment which can nourish and revitalize the scalp, improving its overall health and condition.