System 1 Treatment Size:none Try shape-curling individual tendrils with

Try shape-curling individual tendrils with your fingers

or transfer

Creates 42% more volume

Work a dab of Thickening Volume Shampoo into wet hair 2

System 1 Treatment Size:none Try shape-curling individual tendrils withNioxin Pro Clinical's System Kit 1 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. Formulated with a powerful blend of niacinamide, biotin and caffeine to help nourish the hair root, stimulate hair follicles and strengthen the hair. Nioxin System 1 Scalp + Hair Thickening