Some dark-colored foods contain many essential nutrients. However, these foods can lead to discoloration of teeth, affecting aesthetics and even eroding tooth enamel. The United States MSN life network latest article, published in the United States dental experts summarized “should be rinsed after eating 9 kinds of food”. 1, balsamic vinegar. Balsamic vinegar is dark in color and contains a variety of acidic substances that can easily lead to tooth discoloration. Balsamic vinegar can be eaten with lettuce, lettuce barrier to the teeth have a protective effect. 2, soy sauce. The pigment in soy sauce can also “pollute” the teeth. Eat sushi dipped in soy sauce or other soy sauce-containing food in the process, it is best to drink some green tea or rinse your mouth immediately after eating. 3, ice cream. Delicious and colorful ice cream contains a variety of pigments, will make the teeth “color”. In addition, the low temperature and the sugar in the ice cream will lead to more easily discolored teeth 4, tomato sauce. Tomatoes are highly acidic vegetables, may also erode tooth enamel. Experts say that ketchup should be eaten in moderation. In addition, eating a vegetable salad before eating ketchup can form a protective layer on the teeth. 5, black tea. Drinking tea has a variety of health benefits, but black tea and other dark-colored tea pigments can stain the teeth, affecting aesthetics. The more of this type of tea you drink, the greater the chance of tooth discoloration. Therefore, be sure to rinse your mouth in time after drinking black tea. 6, berries. Eat blueberries, blackberries, cherries and other brightly colored berries will lead to the formation of a thin layer of tooth enamel “stains”. After eating berries, it is best to brush and floss to clean the gap between the teeth, because the acid in the berries will also damage the enamel, resulting in poor teeth. 7, red wine. The acid in red wine can lead to tooth staining as well as tooth enamel wear. Therefore, it is recommended that after drinking red wine, it is best to drink some water and rinse your mouth. 8, hard candy. Eating hard candy can discolor the mouth and tongue and lead to permanent staining of the teeth, it is best to eat less colorful candy. 9, coffee. Dark-colored coffee is one of the culprits of tooth discoloration. Drinking coffee with a little milk helps dilute the pigment in the coffee, and be sure to rinse your mouth after drinking.