1. Coconut Oil
Natural lauric acid found in coconut oil helps fight bacteria that causes plaque to build up on teeth and discolor them. Rinsing your mouth with coconut oil for 10 to 15 minutes -- known as oil pulling
2. Strawberries
Not only are strawberries a healthy snack, but they also can help protect teeth and promote whitening. Strawberries also have malic acid, which fights against surface stains.
3. Baking Soda and Lemon
The combination of baking soda and lemon creates a chemical reaction that leads to a great teeth whitening effect.
4. Banana Peel
Rubbing a banana peel on your teeth can help with discoloration. The natural minerals such as potassium and magnesium that are found in the fruit's peel purportedly work to strengthen and protect teeth.
5. Use a Straw
Constantly exposing your teeth to certain foods and beverages can break down the enamel and make them more susceptible to staining.