What is it: System 1 Treatment is designed for natural, untreated hair with light thinning. Clinically and dermatologically tested, this nourishing and protective leave on treatment strengthens each strand from within, resulting in thicker, fuller hair. Why you'll love it: Nioxin Leave-In Treatment enhances the thickness and fullness of your natural hair. The lightweight formula adds body to your hair, making it look thicker and fuller.
Featured ingredients: Formulated with a powerful blend of niacinamide, wild mint oil and caffeine to help nourish the hair root, stimulate hair follicles and strengthen the hair.