4. Black Coffee
This is one that may be tough for those people that absolutely depend on that cup of joe in the morning to help them start their day. It’s probably not the absolute worst thing for your teeth and adding milk or cream may help reduce the chances of staining your teeth. This is a case where moderation may be the key to avoiding trouble. While one cup of coffee to get you started in the morning may not be much of a problem for your smile, downing four or five cups a day could result in stains that end up being quite noticeable after a few years.