Why can't tea stay overnight?

Because it is left for too long, drinking tea soup overnight may have adverse effects on the human body. Because of the long time.

Overnight tea refers to overnight tea. In the old days, bad sealing of containers would cause poisonous insects to fall in or climb over, and protein and sugar in soup would become nutrients for bacteria and molds to multiply. Because of too long time, most vitamins have been lost, so it is not suitable for drinking.

However, the overnight tea that has not deteriorated has its own magical use in medical treatment. Overnight tea is rich in acid, which can prevent capillary bleeding, such as stomatitis, tongue pain, eczema, gingival bleeding, sores and abscesses, and can be treated with overnight tea. There is no scientific basis for saying that you can't drink overnight tea.

Extended data:

Overnight tea may be harmful to your health.

1. Tea contains tea polyphenols, which are easily oxidized into brown colloid-tea rust in air and water. Tea rust contains many substances such as cadmium, lead, iron, arsenic and mercury. The tea leaves that have not been drunk or left in the cup for a long time, such as overnight tea, are exposed to the air for a longer time, and the more tea polyphenols are oxidized into tea rust. Tea rust enters the human body, combines with protein, fat and vitamins in food, and precipitates, which hinders the absorption and digestion of nutrients.

2. Once these oxidants enter the human body, they will also cause inflammation, ulcer, necrosis and other diseases in organs such as kidney, liver and stomach. Therefore, overnight tea should not be drunk, and tea sets should be scrubbed frequently.

3, the summer temperature is high, tea is easy to rancidity and taste, if put on hold for more than 24 hours, it is best not to drink, otherwise it will cause diarrhea.

4, overnight tea because of too long time, most of the vitamins have been lost, as well as protein, sugar and so on. Tea is not suitable for drinking because it contains nutrients that can breed bacteria and molds.

The overnight tea mentioned above generally refers to Pu 'er, Longjing, Dahongpao and other relatively strong teas. The doctor suggested that strong tea should not be drunk overnight as far as possible, and it should be filtered twice with boiling water when making tea, mainly because the tea was artificially polluted during picking and transportation. For most young people nowadays, most of them like light plant teas such as chrysanthemum, jasmine and medlar. Drinking this kind of tea overnight is not only harmful to the body, but also helpful to the body. Let's focus on the health benefits of this tea.

References:

Baidu encyclopedia-overnight tea