Proper drinking of green tea can prevent moths. Because green tea is rich in fluoride necessary for teeth, and fluoride is an important substance for whitening and strengthening teeth, this substance can play a role in preventing acid and moth when combined with apatite in teeth. This is why most toothpastes contain fluorine. Of course, drinking green tea properly can also make people keep their breath fresh and always have a refreshing mental state.

However, drinking tea for a long time will make the tooth surface covered with a layer of enamel, which is transparent or translucent, and its deep layer is dentin, which is light yellow. The color of healthy teeth is deep dentin, which is pale yellow through enamel.

Extended data

A food beneficial to protecting teeth

1, eat more crude fiber food. Crude fiber foods such as leeks and celery are equally effective in whitening teeth. The reason is actually very simple: when chewing crude fiber food, crude fiber can rub teeth, thus removing food left on teeth and bacteria growing on the surface of teeth and reducing tooth decay.

2. Eat foods rich in vitamins. Some foods rich in vitamins, such as tomatoes and spinach. The effect of whitening and tooth protection should not be underestimated. Especially for the elderly, eating more foods with high vitamin content can not only whiten teeth, but also improve gum diseases such as tooth looseness and gingival congestion caused by vitamin C deficiency in the body.

3. Eat foods containing calcium. Calcium is necessary to keep teeth healthy, while dairy products and bean products are common foods rich in calcium, such as milk and cheese. Cheese is not only a good source of calcium, but also contains calcium and phosphate, which can balance the pH value in the mouth and reduce the possibility of bacterial growth, thus increasing calcium, reducing tooth decay and strengthening teeth.

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People's Daily Online-Long-term drinking tea makes teeth yellow and whitening toothpaste has limited whitening effect.