Brush with berries
These little berries will help lower your risk of high blood pressure, cardiovascular disease and cancer, and as it turns out, are also helpful in whitening your teeth. Which berries? Strawberries. The vitamin C in strawberries will help whisk away plaque build-up, while the malic acid, a natural astringent in the berries, will help to remove surface stains on teeth.
Here's how to do it: Crush strawberries into a pulp and apply that to your teeth with a toothbrush. Let it sit for five minutes and then rinse your mouth well with water. You can get similar results swapping the strawberries with a paste made with lemon juice and salt. Be sure to rinse well after applying that, too.