Nioxin Pro Clinical's System Kit 3 is designed for dry, damaged, colored 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 3 Scalp + Hair Thickening Treatment enhances the thickness and fullness of your natural hair. The lightweight formula adds body to your hair, making it look thicker and fuller. This Scalp + Hair Thickening Treatment helps balance the scalp, creating a healthy environment for hair growth. In addition to its strengthening and nourishing properties, Nioxin System 3 Scalp + Hair Thickening Treatment adds moisture and shine to your hair. To use, apply Nioxin System 3 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 3 Scalp + Hair Shampoo and Conditioner.