Protect & refresh the scalp with Nioxin’s 3-part System 2 Scalp & Hair Treatment for Natural Hair with Progressed Thinning. This leave-in hair & scalp treatment is particularly formulated for natural thinning hair. With Scalp Access 2.0, Nioxin’s treatment helps prevent hair loss due to breakage, providing a refreshed scalp environment & thicker, fuller-looking hair. Nioxin Scalp & Hair Treatment is the final step of a 3-part System, designed to strengthen the hair & amplify hair structure.