Do this to whiten your teeth at home | Dr. Hansaji
The best way to whiten your teeth naturally — though maybe not always the easiest — is to simply brush your teeth with an appropriate toothpaste after eating or drinking something. This takes a lot of persistence and can even be kind of difficult depending on where you are at the time of eating (such as work or school).
Avoiding smoking cigarettes, drinking too much coffee and/or soda, improving your oral hygiene overall, and eating a healthy diet can all also help prevent yellow teeth. If you do regularly drink staining beverages, do so through a straw and try to cut back. Try to drink more plain water after eating or drinking something staining or acidic to help reduce the negative effects.
6 Ways to Naturally Whiten Your Teeth