Kidney damage: Oolong tea contains some organic acids, also known as hydrazine (or hydrazine salt), which is considered to induce drug-induced kidney damage. However, studies have shown that high levels of hydrazine production have negative effects on human body.

Hypokalemia: Hypokalemia is a disease caused by abnormally low serum potassium concentration. This is one of the most common side effects of oolong tea, because excessive caffeine will interfere with the absorption of potassium and eventually lead to hypokalemia.

Stomach pain: Caffeine and tannin in oolong tea stimulate stomach acid and stomach pain. This may be a problem for those who suffer from heartburn and gastric ulcer. Hyperacidity may rise, sprinkle the feeding tube. This can cause mild to severe allergies.

Berberi: Oolong tea interferes with absorption, such as vitamin B 1 or. So excessive oolong tea will lead to virtual body. For example, lack of body is called beriberi. This is another common side effect of oolong tea in another example.

Experts also reminded that there are three taboos for drinking oolong tea:

One of the side effects of oolong tea is that you can't drink it on an empty stomach, otherwise you will feel hungry, even dizzy, and nausea, which is also commonly known as "tea drunk";

The side effect of oolong tea is that you can't drink it before going to bed, otherwise it will make people difficult to fall asleep;

Third, the side effect of oolong tea is that Leng Cha can't drink it, and oolong tea is cold after it is cold, which is not good for the stomach.

Experts also specially reminded that the side effects of these three kinds of oolong tea are particularly important for people who drink oolong tea for the first time, because oolong tea contains more tea polyphenols and caffeine than other teas, and improper drinking is easy to harm their health.