To Keep Teeth White, Don't Light Up Not only is it bad for your health, smoking is one of the worst offenders when it comes to teeth stains. Nicotine

Foods that Cause Teeth Stains

There's another reason to watch what you eat – some common foods can cause tooth discoloration. Here's an easy way to tell if a food might be at fault: Anything that can stain a white cotton T-shirt can stain teeth, say dentists. Coffee stains teeth, for example. Other top offenders are beverages such as tea, dark sodas, and fruit juices. These teeth stains develop slowly and become more noticeable as we age.