Can it be drunk overnight tea, and can it be drunk overnight tea?

I like to brew a pot of tea and drink it slowly, but I often can't finish it, so I can only leave it overnight and drink it again the next day. Many people say that overnight tea can breed bacteria and produce nitrite so it can't be consumed, is this true?

As long as it is stored properly, overnight tea is okay to use. Many people worry about nitrite production, but they don't have to. CCTV reporters have done experiments to send a cup of tea brewed for 12 hours, a cup brewed for 24 hours, and a cup of freshly brewed tea to the Beijing Institute of Nutrition Source for testing.

The results showed that the nitrite content of the tea with 12 hours and 24 hours and the freshly brewed tea did not change significantly, and the highest content was only about 1 4 of the national drinking water standard.

As for the breeding of bacteria, the sugar and amino acid content in tea is very low, and it is not a good "culture medium" for bacteria, and if the lid is closed, it is difficult for bacteria in the air to fall into the teacup, so there is no need to worry too much.

So how long can tea generally sit without spoiling? How to store tea well?

The question of how long it will spoil is not conclusive, which is closely related to factors such as the preservation environment, the condition of the tea, and the variety of tea, but if there is a peculiar smell or obvious changes in color and texture, it is better not to drink it.

It is recommended to close the container with a lid or plastic wrap for unfinished tea, and then put it in the refrigerator for storage, 8 12 hours will generally not deteriorate, after all, one of the fashionable cold brew tea preparation methods is to add cold water and tea leaves to the container, and then put it in the refrigerator to soak and extract for 8 hours.

Can drinking tea overnight cause cancer.

Tea leaves left overnight cannot be drunk.

One. Dangers of overnight tea:

1.Tea contains tea polyphenols, which are easily oxidized into brown gelatinous substances in air and water, that is, tea rust. Tea rust contains a variety of substances such as pickaxe, lead, arsenic, mercury, etc.

The longer the tea water is exposed to the air overnight, the more the amount of tea polyphenols oxidized into tea rust will be. When tea rust enters the human body, it binds and precipitates with proteins, fats and vitamins in food, which will hinder the absorption and digestion of nutrients.

2.Once these oxidizing substances enter the human body, they can also cause inflammation, necrosis and other lesions in organs such as kidneys, liver and stomach. Therefore, tea leaves left overnight should not be drunk, and tea utensils should also be scrubbed frequently.

3.The temperature is high in summer, and the tea is easy to deteriorate, if it is left for more than 24 hours, it is best not to drink it, and some elderly people with weakened resistance can easily cause diarrhea.

4.Most of the vitamins have been lost due to the long time of the overnight tea water, and the proteins and sugars in the tea have become nutrients for the reproduction of bacteria and molds, so it is not suitable for drinking.

Two. A misconception about overnight tea.

Drinking overnight tea water will cause cancer, this statement is not correct, long-term tea will produce nitrite, but nitrite itself is not carcinogenic, only nitrite into the human body and gastric acid, the formation of nitrosamines, is a strong carcinogen, and liver cancer and other diseases are closely related.

The nitrite content is a safe dose within a certain range, and the nitrite content produced by overnight tea does not exceed the unit of this safe dose, which also shows that the statement that overnight tea water will cause cancer is actually false.

Can drinking tea overnight cause cancer.