Is it good to drink overnight tea, and what will happen if you drink 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.

Let's put it simply, fungi and bacteria are everywhere, and it is better not to drink even overnight water, let alone tea ......

I don't know when it began, the folk began to spread the saying that "overnight tea will cause cancer", which made many friends who love tea, especially those who have drunk overnight tea, at a loss. Proponents of this view often offer the killer feature of the carcinogen "nitrosamines", which can immediately startle people who have only heard of its name but do not know the specifics. However, there has never been any scientific experiment or evidence to prove that the claim that "overnight tea causes cancer" is tenable.

First of all, we have to figure out the concept of "overnight tea". Why do you like to talk about "overnight tea"? Could it be that there are any special substances in tea that only work at night, and it is okay to leave it for more than ten hours in broad daylight?

No, overnight tea refers to the tea soup that has been placed for a long time, whether it is day or night, as long as it is placed for a long time, it is considered "overnight tea". In fact, due to the large fluctuations in temperature during the day, the changes in the tea soup are even greater than at night.

Next, let's see if the nitrosamines in the tea soup can cause cancer. It should be pointed out that the tea soup does not contain carcinogens nitrosamines, but secondary amines. This is not unique to tea, it is found in many foods, especially preserved products, and the amount in teas is much lower than in our staple foods or vegetables.

Moreover, secondary amines are not carcinogens themselves, and nitrosamines are formed only when they coexist with nitrates under certain conditions and undergo chemical reactions. Finally, according to relevant studies, nitrosamines can only be carcinogenic if they reach 100 200 mg/kg body weight and require sustained high doses.

The reason why it is recommended not to eat overnight dishes is because vegetables contain more secondary amines, and it is easy to produce a large amount of nitrosamines after overnight, but the secondary amines in the tea soup are much less, and even if they become nitrosamines, the amount is not enough to cause cancer unless you take overnight tea every day to "eat as a meal". On the contrary, the tea polyphenols and vitamin C in the tea soup can effectively prevent the body from synthesizing nitrosamines, which are natural inhibitors of nitrosamines. Therefore, the argument that "overnight tea can cause cancer" is untenable.

However, the fact that overnight tea does not cause cancer does not mean that we can drink more, and it is better to drink less. The reason is that if the room temperature of the tea soup is high, especially in summer, the overnight tea may be contaminated by microorganisms and spoiled or spoiled, so of course it cannot be drunk. All in all, it is best to drink less overnight tea, but even if it may be harmful to human health, it is because of the deterioration of the tea soup, not some sensational "carcinogenic".

Overnight tea has lost most of its vitamins due to too much time, and the proteins and sugars in the soup have become nutrients for bacteria and molds to multiply, so it is not suitable for drinking. However, overnight tea that has not deteriorated has its own wonderful use in medical treatment. Overnight tea is rich in acids, which can prevent capillary bleeding, such as stomatitis, tongue pain, eczema, bleeding gums, sores and abscesses, etc., can be used overnight tea**.

Many people feel that overnight tea cannot be drunk, and there are many theories, among which the more "alarmist" is that drinking overnight tea will cause cancer, but in fact, this statement has no scientific basis.

What happens when the tea is left out for a long time? How to drink tea healthiest! The main change is the further oxidation of the tea polyphenols, which darkens the color.

A cup of clear and turquoise tea, especially if left for a long time in high temperatures, will lose its green color and increase the degree of yellowness. This is the oxidation product of the oxidation of tea polyphenols in tea to form yellow-red and reddish-brown, mainly theaflavin, thearubigin, theabrownin, etc. These products are non-toxic and do not cause harm to the human body.

In the summer morning brewed tea in the afternoon is best not to drink, some people like to make a pot of tea to drink all day, this is not good, not only tea is easy to be infected with bacteria, and tea brewing is a certain number of times, too many brewing times will be the tea contains some bad substances also to brew out, (generally reasonable brewing times are not brewed harmful substances) originally drink tea for health, do not become harmful because of improper tea drinking.

If you take out the tea leaves and put them in the refrigerator overnight tea, it is recommended not to drink them at room temperature, because it will hurt the stomach, and because of the temperature and temperature of the weather, you can't control the rate of decay.

If the tea is left overnight, the tannic acid contained in the tea will be released in large quantities, if you drink it all, it may cause gastrointestinal discomfort, because the tannic acid will combine with gastric acid, easy to precipitate in the stomach, may damage the gastric mucosa, cause diarrhea, so overnight tea should be tried not to drink. As for the rumors on the Internet that overnight tea should not be consumed, it may be harmful to health and may even cause cancer, but there is no research to confirm it.

I really don't want to pour out the tea, at least take out the tea first, and then put it in the refrigerator to store it, and drink it the next day, it will be better.

Overnight tea is not good for the body, and it is best not to drink it.

Overnight tea generally refers to the tea soup brewed in the afternoon or evening of the first day and put it on the next morning, and the time passes through one night, which is called overnight tea. In the past, it was said that drinking overnight tea caused cancer, and experts in China's food industry gave a conclusion as early as the 80s that it would not cause cancer.

Normally, overnight tea can be used to rinse your mouth or take a few sips to moisten your throat the next morning, which is also the result of the practice of the older generation of tea drinkers. However, from the perspective of nutrition and hygiene, if the tea soup is left for a long time, the vitamin C and other nutrients in the tea soup will be reduced due to gradual oxidation, and the taste will become bland. In addition, especially in summer, at high temperatures, placed for a long time, the proteins and sugars in the tea are the medium of bacteria and molds, which are easy to breed molds and bacteria, resulting in the deterioration and corruption of the tea soup, and the spoiled tea soup cannot be drunk.

Whether overnight tea can be drunk depends on personal understanding of "overnight tea", generally speaking, from the perspective of nutrition or tasting, tea brewing and drinking should be brewed and drunk. Fresh overnight tea can be used to cough or drink a few sips, but there is no nutrition and taste at all, and it should not be brewed again, and the proverb says: "Tea can be drunk more, not more brewing".

Tea ceremony in the middle of the ren, ed.).

You can't drink it! Because tea leaves can produce bacteria very quickly, overnight tea has already produced bacteria and cannot be drunk.

You can't drink it, but you can use it to wash your face and soak your feet, and the effect is very special.

You can't drink it, he will secrete something overnight, which is not good for the human body.

If you can't drink it, you may have diarrhea.

Can drinking tea overnight cause cancer.

Drinking tea is a long-standing health water drinking habit of the Chinese nation, which can reduce cholesterol, purify the blood, strengthen the heart, diuretic, and refresh the brain. So, can you drink overnight tea?

What is Overnight Tea? It does not mean that the brewed tea is called overnight tea after one night, it should depend on how much time has elapsed after the tea has been brewed.

We can use 8 hours and 12 hours as nodes. Overnight tea that is more than 24 hours old has a higher chance of mold, bacteria and mildew, so it is not recommended to drink it; Hours to 12 hours, depending on the weather and temperature, 12 hours in summer is also perishable, and about 12 hours in winter is better.

In general, overnight tea within 12 hours is not a big problem. Of course, it is definitely not as fragrant and nutritious as freshly brewed tea, but the nutritional factors will be reduced, and drinking it will not harm your health.

3 reasons to tell you, don't drink overnight tea! 1. Tea contains tea polyphenols, vitamins, catechins, amino acids and other components, antioxidant is one of the important effects of tea, tea exposed to the air for a long time, vitamin C, etc. are oxidized, tea polyphenols are oxidized into tea pigments, and the antioxidant effect will be weakened, especially green tea and white tea.

2. After the tea is left for a long time, tannic acid will be produced, and the tannic acid will be completely dissolved in the tea. After drinking in the morning, and then eating breakfast, tannic acid will interact with food to produce oxalic acid, and tannic acid and oxalic acid combine to cause chemical changes, which is easy to produce stones. At the same time, tannic acid also makes other nutrients more difficult to digest.

3. If the overnight tea is left for more than 24 hours, because the tea itself contains sugar and a small amount of protein, it will become moldy under suitable temperature and humidity conditions, produce bacteria and mold, and cause diarrhea. Therefore, tea that has been more than 24 hours old should not be drunk, especially in the summer when the temperature is high.

In addition, for some strong teas, there have been medical demonstrations that brewing time exceeding a certain limit will cause a certain amount of *** and produce some corresponding harmful substances.

In short, the harm of overnight tea is limited to spoiled overnight tea, and overnight tea without spoilage will not be harmful to health, on the contrary, there are many health benefits Overnight tea is rich in alcohols and fluoride, which can prevent capillary bleeding. If you suffer from oral bleeding, ** bleeding, sores and abscesses, etc., you can use it to treat them. If the disease is in the mouth and nose, you can use overnight tea to wash and rinse.

These people can't drink a sip of tea1, and they should not drink tea when they suffer from neurasthenia or insomnia, stomach ulcers, heart disease, or high blood pressure.

2. Women who drink strong tea during menstruation are prone to dysmenorrhea, prolonged menstruation and excessive menstrual bleeding; Pregnant women drinking strong tea will affect the nutrition and development of the fetus; Drinking strong tea during lactation, caffeine can enter the baby's body through milk, causing the baby's excitement, crying and intestinal spasms, and will also inhibit the secretion of milk, resulting in a decrease in milk secretion.

It is not good for the body, because a lot of bacteria will enter the overnight tea at night and react with the tea, and drinking it in this way will have a certain impact on our body.

Not good. Because overnight tea can breed bacteria. Drinking it can cause discomfort in the body. So don't drink overnight tea.

I think drinking overnight tea is not good for our health, because tea soaked in water can secrete some elements that are harmful to our body, and after overnight brewing, some more toxic tea polyphenols will be produced, which can affect our health.