Refresh the scalp and increase hair volume with Nioxin’s 3-part System 1 Scalp & hair Treatment for natural hair with Light Thinning. This professional product refreshes the scalp and gives a healthy shine to natural hair. Thanks to its Transactive Delivery System 2.0 technology, the volumizing Nioxin leave-on treatment helps provide thicker-looking hair by increasing the fullness of each hair strand. Nioxin’s diameter-increasing Scalp Treatment is the final step of the 3-part System, which amplifies hair texture while protecting against breakage.