1, affecting sleep

Black oolong tea has a refreshing effect, but drinking it before going to bed at night will affect sleep, and drinking too much will lead to insomnia.

2, affect the absorption of iron

Everyone knows that black oolong tea has a good health care function, but if it is drunk for a long time, it will have a certain impact on the human body's ability to absorb iron. When the human body is seriously deficient in iron, it will cause iron deficiency anemia.

3, affect digestion

Moderate consumption of black oolong tea can promote human gastrointestinal digestion, but large consumption of black oolong tea will dilute gastric juice, leading to indigestion, abdominal pain and other symptoms, especially drinking black oolong tea on an empty stomach will make this situation more serious.

4, easy to diarrhea

If the body is weak and the spleen and stomach are not good, black oolong tea will cause gastrointestinal discomfort, and it is easy to have diarrhea after drinking it.