Nioxin Diaboost Xtrafusion Treatment t increases the hair 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, niacinamide and panthenol, Diamax thickens the hair at the roots, whilst also protecting against breakage.Try this thickening treatment daily alongside your 3-Part Nioxin System Kit. *vs.non-conditioning shampoo