THE FIRST TOOTHPASTE TO WHITEN TEETH INSTANTLY AND GIVE YOU BRILLIANT ENAMEL USING LIGHT Toothpaste with Actilux®, the patented technology that whitens teeth naturally using light. Actilux® microcrystals bind to tooth enamel to create an invisible, protective barrier that reacts to both natural and artificial light, activating and breaking down stains, thereby whitening teeth, day after day, every time you smile.