iBrite Nano-Bio Toothpaste is specially formulated to remove stains and whiten teeth without increased sensitivity. The formula includes clinically-proven desensitizing agent Potassium Nitrate to relieve tooth pain. Nano-grade bio-activited ingredients can penetrate deep to gently clean sensitive areas of your teeth and provide lasting sensitivity protection with twice daily brushing. As part of a regular tooth whitening regimen, iBrite Nano-Bio Toothpaste will make a noticeable improvement in the discomfort and sensitivity you experience from tooth whitening.