Nioxin Diaboost Xtrafusion Treatment for Thinning Hair 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. *Nioxin Money Back Guarantee is applicable on selected Nioxin products.**vs.non-conditioning shampoo Nioxin is the N°1 Salon Brand for thicker and fuller hair with more than 30 years expertise in thinning hair.