The common ways to whiten teeth are as follows: Method 1: Using a little yeast powder on your toothbrush while brushing can help whiten your teeth. Method 2: Chew the raw peanuts, do not swallow, take the peanut crumbs as toothpaste and brush your teeth can make your teeth white. Method 3: home vinegar, aged vinegar, white vinegar can be, but not vinegar extract in the mouth for 1-3 minutes, then spit out and brush your teeth. This method can be used, and regular use will make the teeth white. Method four: scaling, is the cure for the symptoms, and scaling is not to make teeth white, but only become cleaner. Method 5: Cold light whitening will make the teeth whiter and more effective. The principle is to use a special bleaching agent, which is catalyzed by cold light, and then the oxidation reduction reaction with the surface of the teeth as well as the deep pigment is released, so that the teeth are whitened. Method 6: Brush your teeth diligently, and brush your teeth not sloppily, but once in the morning and once in the evening, and brush your teeth for 3 minutes, so that you can clean your teeth thoroughly. Method 7: is the tooth powder this effect is better, like tea stains, smoke stains, coffee stains can be brushed off, the effect is more obvious.