1. One strawberry, 1/2 teaspoon of baking powder. Crush the strawberries into a paste, mix thoroughly with baking powder, use a soft toothbrush to evenly apply the mixture on the surface of the teeth, brush off the mixture with toothpaste after 5 minutes, and then rinse your mouth.

2. Dry the orange peel, grind it into powder, mix it with toothpaste and brush your teeth. Your teeth will become white quickly. After you brush your teeth, apply lemon juice to each tooth. When brushing your teeth, use some yeast powder on your toothbrush to help whiten your teeth. Chew raw peanuts, do not swallow them, and use peanut crumbs as toothpaste to brush your teeth to whiten your teeth.

3. Hold the vinegar at home (either mature vinegar or white vinegar, but not vinegar essence) in your mouth for 1 to 3 minutes, then spit it out and brush your teeth. The effect is very good! However, the teeth will feel very sore and numb (the feeling will last about 2 minutes) and cannot be continued continuously. Do it frequently, once every 2 months or so, and it will be fine. Otherwise, it will be bad for the teeth. It can be used as a first-aid method when there is an emergency (for example, before going out for a date, your teeth are very yellow), and it can also remove bad breath.

4. Calcium and phosphate can balance the pH value in the mouth, prevent the mouth from being in an acidic environment that is conducive to bacterial activity, and cause tooth decay; regular consumption can increase the quality of calcium (calcium food) on the tooth surface, which helps Strengthens and rebuilds enamel, making teeth stronger. Tropical fruits (fruit foods) contain high vitamin C, which can maintain gum health. If there is a severe deficiency, the gums will become fragile and prone to disease, with symptoms such as gum swelling, bleeding, loosening or loss of teeth.