Just like dark-colored beverages, richly colored sauces can also seep into your tooth enamel and cause staining, so you'll have to be careful about how much of them you consume.
If you eat a lot of ethnic foods, you'll probably find that the sauces they incorporate could stain your teeth. Be on the lookout for dark or brightly colored sauces -- a good rule of thumb is that if the liquid could stain your clothes, it'll probably stain your teeth. Soy sauce and sauces containing balsamic vinegar also fall into this category.
Comfort foods made with brightly colored sauces, such as tomato sauces, can also significantly stain your teeth. That doesn't mean you have to completely avoid them, though. Start your meal with some stain-fighting vegetables like spinach or broccoli before you dip into the sauce. These veggies create a protective film on your teeth that covers up and shields the porous enamel.
Got a sweet tooth? You'd better be careful. Click through to find out why.