Overnight tea cannot be drunk, it will go bad and cause cancer, is it true or false? Listen to what the doctor says

Chinese people love to drink tea. From emperors to common people, everyone loves tea. Tea has been with the Chinese for more than a thousand years. During this period, there has always been an unwritten rule: overnight tea is as poisonous as a snake and is harmful to the body. Especially in recent years, some people have always said: "Overnight tea will go bad and cause cancer." So what is the truth? Today, let's reveal the mystery of "overnight tea goes bad and causes cancer"

Will overnight tea go bad? The so-called overnight tea will go bad, which does not simply mean that the tea will go bad overnight, but that the tea will lose its original taste and flavor after being brewed for a long time, and even become sour and sour. For example, if the tea is brewed at 23:00 in the evening, it will be considered overnight at 0:00, but this is only an hour apart, so the overnight tea in everyone's mouth still means that it is brewed for too long. CCTV once did a program. They deliberately brewed Pu'er, chrysanthemum, and Longjing teas for 12 and 24 hours respectively, and then invited national senior tea artists to taste them. The final conclusion was: overnight tea and freshly brewed tea have no deterioration or sourness in taste or flavor. In fact, the taste and mellowness of overnight Pu'er are better, so overnight tea will not go bad.

Will overnight tea cause cancer? Why do so many people firmly believe that overnight tea can cause cancer? It is probably because the nitrite content in tea will increase after being soaked for a long time, and once excessive nitrite comes into contact with stomach acid, it is easy to be converted into nitrosamines, which are internationally recognized carcinogens. However, all the harms that are not related to dosage are "playing rogue". At present, the country has not issued safety standards for nitrite in tea, but we can refer to the safe dose of nitrite in drinking water as a reference. The state stipulates that the safe dose of nitrite in drinking water is ≤1mg/L. The final result of sending tea that has been soaked for 24 hours to the Beijing Institute of Nutritional Sources is: no matter what kind of tea it is, the content of nitrite in the tea after 24 hours of soaking is less than 0.3mg/L, which is far lower than the safe dose of 1mg/L. In other words, "overnight tea" is safe and will not cause cancer.

In addition to the above tests, the Hubei Provincial Department of Education also conducted a study on "overnight tea" for a longer period of time. They tested the nitrite content in the tea after it was left for 60 hours, and the conclusion was still: after 60 hours, the nitrite content in the tea was less than 0.3mg/L, which is far below the safe dose of 1mg/L. It is even "safer" than simply overnight water.

How to drink overnight tea more safely? Overnight tea does not cause cancer, but drinking tea on an empty stomach may irritate the stomach. Especially for those with a bad stomach, you must eat breakfast before drinking morning tea. In order to avoid irritation of the stomach by cold tea, you can mix it with warm water first, so that drinking overnight tea is safe and healthy. People often say: "firewood, rice, oil, salt, sauce, vinegar and tea", after reading this article, you don't have to worry about overnight tea becoming sour and causing cancer.