Nioxin System 5 Scalp & Hair Treatment offers specific care for damaged, slowly thinning hair by amplifying 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. Thanks to the remarkable Transactive Delivery System 2.0 within it, the nourishing, non-aggressive, as well as soothing key elements, will reach every bit of your hair.