 on food stains, coffee and wine stains, even on veneers, crowns, and dentures. I eat the blueberries, I drink the coffee, and I know that Smile Actives will keep my teeth white every day. If you could use something so easy like Smile Actives to take yellow teeth to white teeth, why wouldn't you? Why spend hundreds of dollars for whitening treatments at the dentist when now you can whiten your teeth with new Smile Actives Pro Whitening Gel every time you brush your teeth.