Gel serum to apply after whitening treatment or for take-home care. Patented WX formula restores a youthful, healthy appearance and helps protect teeth against stains from food and drink. As effective as whitening strips but contains no peroxide. Reduces and helps prevent tooth sensitivity. Covers surface imperfections and white and yellow spots on teeth for an even, white smile. Rejuvenates tooth enamel to its natural radiance. Using biomimetic science - the process that imitates nature - the concentrated Hydroxya-Peptide formula creates new white enamel in one week.