2, old vinegar, white vinegar can be (but not vinegar essence), contained in the mouth 1 minute to 3 minutes, and then spit it out to brush your teeth.
The effect is very good. But even the teeth will feel very sour, and the numbness (feeling will last for about 2 minutes) will not last. Do it often, about once every two months, and it will be fine. Otherwise, it's bad for your teeth. It's an emergency measure (such as finding yellow teeth before going out on a date), well, it can get rid of bad breath).
3. Dry the orange peel, grind it into powder, mix it with toothpaste and brush your teeth, and your teeth will soon turn white.
4. When brushing your teeth, using some yeast powder on your toothbrush can help whiten your teeth (the method commonly used by MODEL).
5. After brushing your teeth, wipe each tooth with lemon juice.
6. Chew raw peanuts, don't swallow them, and brush your teeth with peanut crumbs as toothpaste, which can make your teeth white.
7. Use the bones of cuttlefish, crush them and put them in a toothbrush to be used as toothpaste, and get immediate results (cuttlefish is cuttlefish and squid. It has a big white bone. Scraping nails can produce a lot of white powder, which can be used as toothpaste to whiten teeth.
8. Sprinkle some salt on the toothpaste every time you brush your teeth.