Nioxin Scalp + Hair Thickening System 1 Treatment – Serum for Natural Hair with Light Thinning is clinically and dermatologically tested, This nourishing and protective leave-in treatment strengthens each strand from within, resulting in thicker, fuller hair.Key benefits:- Clinically designed to add thickness and fullness to natural hair with light thinning, with visible results in just 30 days.- Advanced formula gently cleanses the scalp, removing impurities and excess sebum that can clog hair follicles.- Helps minimize hair breakage, promoting the appearance of fuller, thicker hair.- Infused with antioxidants and uv protecting ingredients, this treatment can nourish and revitalize the scalp, improving its overall health and condition.To use:Apply Nioxin System 1 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 1 Scalp + Hair Shampoo and Conditioner.