The tea polyphenols in tea can promote ethanol metabolism and have a protective effect on the liver. Allows ethanol metabolism to proceed normally and smoothly. Drinking tea can increase vasoconstriction function. Theophylline has a diuretic effect, which can promote the rapid excretion of alcohol from the body and reduce the harm of drunkenness. Drinking tea can also supplement the vitamin C needed for alcohol hydrolysis and stimulate the brain center that is anesthetized by alcohol. Thus it plays a hangover effect. And using tea to relieve hangover will never harm the spleen and stomach, and will not cause the drunk to vomit a lot or cause nausea.

Pu'er tea has a better sobering effect. Zhao Xuemin of the Qing Dynasty specifically mentioned in "Supplements to the Compendium of Materia Medica" that "Pu'er tea is the best for sobering up." This is because after Pu'er tea enters the human intestines and stomach, it will form a layer of mucous membrane attached to the surface of the stomach, creating a beneficial protective layer for the stomach. Moreover, Pu'er tea contains more soluble sugar than other teas, which also has a special effect on hangover. Therefore, Drinking Pu'er tea has a better hangover effect.