Celery When you take a big bite of celery, it is helping your teeth to do a major cleaning, so that you have less chance of tooth decay. This is because the coarse fibers act like a broom and sweep away some of the food debris from your teeth. How: Cut celery, gherkins and carrots into strips, chew them, massage your gums and get your daily dose of vegetables along the way. Guava Guava has the highest vitamin C content of any fruit. Vitamin C is an important nutrient for maintaining healthy gums, and people with severe deficiencies will have weak gums and be prone to disease, swollen gums, bleeding, loose or lost teeth and other symptoms. Method: It is recommended that office workers who often eat out or work under stress should carry a guava with them and eat it when they are hungry or mentally ill. Cheese Everyone knows that insufficient calcium intake will shake the bone, in fact, it will also damage dental health. Cheese is not only a good source of calcium, but it also has other protective effects on the teeth. Method: Have a tomato and cheese sandwich for breakfast. 2 slices of whole wheat toast with 1 slice of tomato about 3 cm thick and 1 slice of low-fat cheese, squeeze a little yellow mustard sauce and sprinkle a little black pepper, wrap the whole toast with tin foil, put it into the preheated oven and bake for 8 to 10 minutes. Green Tea Many studies have pointed out that green tea has a strong antioxidant power. On the one hand, green tea contains a large amount of fluoride, which can bind with the apatite in the teeth and has an anti-acid and anti-cavity effect. On the other hand, the catechins in green tea can reduce the Streptococcus pyogenes that cause tooth decay in the mouth, and also remove unpleasant breath. Method: Drink 2 to 5 cups of green tea a day, and it is recommended to drink it after a meal or a dessert. However, green tea contains caffeine, so pregnant women should drink it in limited quantities. Onions The sulfur compounds in onions are powerful antibacterial ingredients that can kill many kinds of bacteria, including Streptococcus pyogenes, which causes our tooth decay, and they work best when fresh and raw. How: It is recommended to eat half a raw onion every day, not only to prevent tooth decay, but also to help lower cholesterol, prevent heart disease and boost the immune system. When making a lettuce salad, peel a few slices of fresh onion and add them to it; or in a burger or sandwich, sandwich some raw shredded onion. Shiitake Mushrooms Studies have found that shiitake mushrooms are helpful in protecting teeth. The reason is that the mushroom polysaccharides contained in shiitake mushrooms can inhibit the production of plaque by bacteria in the mouth. How: Mushrooms have a unique flavor and are low in calories, making them delicious in soups, stir-fries and cold dishes. Eating a variety of mushrooms 2 to 3 times a week is an easy and inexpensive way to take care of your health.