Nioxin’s Diameter System 1 Scalp & Hair Treatment (natural Hair, Light Thinning) revitalizes the scalp and reinforces hair strength. This lightweight, leave-on treatment nourishes and protects using antioxidants and white tea extract.Eucalyptus and peppermint oil invigorate while enhancing hair’s fullness and providing a shield against breakage. Ideal for those with light thinning and natural hair, it boosts volume and promotes healthier, thicker-looking hair.