Your smile is important. It’s one of the first things people notice when they meet you, and a brighter, whiter smile can help you feel better about yourself and leave a lasting impression. Unfortunately, a multitude of factors conspire against you to stain your teeth. No matter how often you brush them, coffee, tea, red wine, colas, tobacco and even orange juice will slowly but surely turn your teeth yellow. It’s usually very gradual, so you don’t notice until the change is quite significant or until someone tells you.