this is not fast, but it is not expensive, it works and its all natural. go to the health food store or GNC or maybe even Wal-Mart in the vitamin section and get activated charcoal capsules. it is BLACK and will NOT make your teeth black. you take them apart and dip your wet toothbrush in the powder and brush with it. it is NOT harmful to the enamel on your teeth. If you dont believe this, google it. it makes your teeth bright white in 2 to 3 weeks if you use it everyday. your teeth feel very clean and it has no taste. the black will rinse right out of your mouth with water. it doesnt stain your tongue.