Some foods can erode your enamel, especially if your enamel is weak or if you consume many foods that are highly acidic, such as fruits like oranges and grapefruit. You can combat acid erosion by swishing water in your mouth after consuming high-acid foods, or using a straw to limit contact between your teeth and the food you eat. Flossing and regularly brushing also serves to limit the damage acids can wreak on your teeth. It is also helpful to use mouthwash every day so that your teeth will be as protected as possible from acid damage, as a Beverly Hills dentist can tell you.