Nioxin System 4 Cleanser Shampoo For Noticeably Thinning, Fine, Colored Hair Is A Daily Volumizing Cleanser That Removes Follicle-clogging Sebum, Fatty Acids And Environmental Residues From The Scalp Skin And Hair. Cleanses To Provide Thicker-looking Hair. The Bioamp Helps Provide Thicker-looking Hair By Increasing The Fullness Of Each Hair Strand. The Glyco-shield Helps Provide Protection And Moisture Balance To Chemically-treated Hair. Finally, The Scalp Access Delivery System Helps Clean Away Follicle-clogging Sebum And Environmental Residues From The Scalp Skin. Detoxifies, Nourishes And Shields Color-treated Hair From Breakage, Energizing The Scalp. A Combination Of Antioxidant Agents Decreases Accelerated Thinning So That Denser, Radiant Hair Can Grow.