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