Chewing tea residue after drinking tea helps to keep healthy. Some people chew tea residue after drinking tea, because tea contains more nutrients such as carotene and crude fiber. But considering the safety, this method is not recommended. Because tea residue may also contain trace amounts of heavy metal elements such as lead and cadmium, as well as water-insoluble pesticides. If you eat tea residue, you will take these harmful substances into your body.

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Other functions of tea are not systematic, but they are as follows: Shuo Wen Jie Zi says: "Burning cigarettes can repel mosquitoes: Gladiolus gives birth to pill spots, Leng Cha, and sesame oil sprinkles leaves". "Help me" said: "Bad mouth, tea roots instead of tea." Compendium of Materia Medica: To cure acne itching, it is advisable to burn tea and cigarettes in the room.

Cancer prevention: making tea in a pot is more beneficial to health. Compared with simply making tea in a cup filled with boiling water, this method of making tea can release more anticancer chemicals.

Disease prevention: black tea has strong antibacterial ability. Gargling with black tea can prevent colds caused by viral diseases, prevent tooth decay and food poisoning, and reduce blood sugar and hypertension. Studies have shown that black tea is as effective as green tea and is more beneficial to the heart.

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