On the question of whether overnight tea can be drunk, there have been studies that show that the main difference between overnight tea and ordinary tea is the occurrence of further oxidation of tea polyphenols, and the oxidation products of tea polyphenols are mainly yellowish-red and reddish-brown, so that the color of tea will become darker. However, these products are non-toxic, no harm to the human body. So from this point of view to answer the question of whether overnight tea can drink, the answer is to drink.

But on the other hand, some people speculate that the tea will be put on the night after the cancer-causing substances such as nitrosamines, in fact, even if the overnight tea really contains such substances, then the content is also insignificant, and nitrosamines can only produce cancerous effects of long-term persistent consumption, so the face of the overnight tea can not be drunk on this issue, this argument is a bit fussed over.

And before the news has been reported on the overnight tea is drinkable, its ingredients have been tested accordingly, on the human body on no harm, more does not exist in the possibility of cancer, so that we do not dwell on the overnight tea can not drink this problem.