This layer of 'dental scale' does not harm teeth and can be removed through ultrasonic teeth cleaning. However, many people still find their teeth somewhat yellow after cleaning — this is the color stained by tea during drinking, which cannot be removed by cleaning, just like the staining caused by coffee or red wine.

It is recommended here that after drinking tea, you should rinse your mouth with water, and then brush your teeth thoroughly three times a day. If you can do this, tea lovers' teeth are less likely to become stained.

Tea has many benefits for teeth. Tea contains polyphenols, which can counteract nicotine toxins, neutralize alcohol, and remove odors and fishy smells. Rinsing the mouth with tea water in the morning or after eating fishy food can effectively remove bad breath.

In addition, tea contains fluoride. Among ordinary foods, tea has the highest fluoride content, which can help prevent tooth decay and periodontal disease to some extent, making teeth stronger.

Dentists believe that the poor dental health of some tea drinkers is due to other harmful oral habits while drinking tea, such as smoking while drinking, not brushing teeth thoroughly, or failing to remove dental calculus for a long time.