Nioxin Diaboost Xtrafusion Treatment is a hair product that helps you to get thicker hair that increases the thickness of each strand, leaving the hair instantly fuller-looking**. With just one use, the hair becomes more manageable, fuller and noticeably thicker. Using HTX technology that contains ingredients like caffeine and niacinamide, Diamax thickens the hair at the roots, whilst also protecting against hair breakage.Try this hair thickening treatment daily alongside your 3-Part Nioxin System Kit.