Nioxin System 6 Scalp & Hair Treatment offers accurate care for damaged, progressed thinning hair by maximizing the diameter of strands, while also nourishing them. Fitted to one's needs, this third and final step towards healthier, fortified hair, hydrates strongly to atone a low-level of density. Under a cleansing, optimizing, and precise treatment philosophy, this product is ideal for chemically-treated hair with thinner, damaged roots.