Baking soda is a common household product that can be found in many whitening toothpastes. Using it to remove stains from teeth is common practice.

How does it work? It is composed of a chemical compound that makes soda a great mild abrasive. That is why it effectively removes surface stains from your teeth and even make them appear whiter. However, baking soda will not be able to remove deeper, older stains. It is not that effective.

THIS IS IMPORTANT: If you are considering using this method to help whiten your teeth, you need to be aware of possible side effects. With continual use, you could cause damage to the enamel that coats your teeth.

More Info: www.colgate.com