4. Rinse (or chew) after you eat
Obviously, brushing your teeth after a meal is best, but if that isn’t an option, rinse out your mouth after eating. “If you can’t do that, the best thing to have at the end of a meal is a piece of cheese,” says Dr. Iacopino, explaining that cheese neutralizes the acid that does damage to teeth. Munching on an apple (or any crunchy, fibrous food) is a good bet too, because it gets the saliva going and helps clean the teeth, mouth and tongue. Sugar-free gum also helps stimulate salivary flow, which will reduce enamel-wearing acid in your mouth.