The NUPRO Gold Tooth Whitening System combines the proven effectiveness of 10 percent Carb-amide Peroxide with the great minty taste of NUPRO® Prophy Paste. The system now is available in bulk kits. NUPRO Gold has been clinically-proven in a study at the University of North Carolina to make teeth an average of eight shades lighter on the Vita Shade Guide. The whitening system is available in three kits: Deluxe, Standard and Touch-up. The tooth-whitening system is available through your local Dentsply Cavitron/Ash dealer or by calling (800) 877-0020, Ext. 180.