People with bad teeth should eat foods that are softer in texture. If you often eat harder foods, it is easy to cause unnecessary wear and tear on your teeth. For example, you can eat bananas, peach, watermelon, rice, noodles, thin rice, etc. These foods can protect your teeth. People with bad teeth can eat more food rich in vitamin C, because vitamin C can improve the resistance of the mouth and prevent gingivitis, periodontitis and other periodontal diseases. People with bad teeth should eat low sugar food, because if sugar is eaten too much, it is easy to react with saliva in the mouth, which leads to the easy formation of tooth decay. For example, eating hair cake or West Lake beef soup, vegetable porridge, etc., these foods do not have too much sugar, which can also reduce the possibility of tooth decay.