5. Sweets
In addition to the obvious hazards to your teeth that sugar-laden candy represents, all those bright colors that make so many sweets look so appealing can also stain your teeth. Granted, you’d probably have to be an award-winning junk food junkie to consume enough candy to stain your teeth, but considering how bad all that sugar is for your health in general, it’s a much better idea to make candy an occasional treat that you enjoy once in a while instead of something you indulge in regularly.