Can 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.

Tea cannot be drunk overnight.

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.

Life kisses me with pain, but I want to repay it with a song.

Can drinking tea overnight cause cancer.

It is best not to drink overnight tea.

Overnight tea has lost most of its vitamins due to a long time, and the proteins and sugars in the tea soup will become nutrients for bacteria and molds to multiply, so people usually think that overnight tea cannot be drunk.

The number of microorganisms left over from the overnight tea after drinking will increase due to the contact between the lid and the hands and mouths during the drinking process. Tea is exposed to the air and rotten, and it is easy to breed spoilage microorganisms after a long time, which makes the tea soup spoiled, and the nutrients such as tea polyphenols and vitamin C are easy to oxidize and decrease.

Therefore, it is best not to drink overnight tea, and it is generally recommended to drink it as it is brewed. Strong tea should not be drunk overnight, and it needs to be filtered twice with boiling water when making tea, mainly because Hungerzheng tea is artificially polluted during picking and transportation.

Tips for overnight tea waste utilization

1. Clean your clothes.

New clothes or fabrics usually have a pungent and unpleasant smell, which is caused by the dye, and if it is not removed, it is very uncomfortable to wear on the body. Grab a handful of tea leaves and burn them, and use the smoke to smoke the flavor. A small handful of tea leaves can be used to wash the velvet after brewing tea, which can also remove dirt and keep the color bright.

Oil stains on dark clothes can be removed by scrubbing with residual tea leaves.

2. Watering the flowers.

Residual tea contains nitrogen atoms needed for plant growth, and watering flowers with residual tea water can add nutrients and maintain soil moisture.

3. Clean your home.

Painted doors and windows, sleepy orange furniture, or glass windows and doors can be scrubbed with cold tea grounds to look particularly bright and white. Use tea residue to scrub the mud stains on mirrors, glass, doors and windows, furniture, cardboard and leather shoes, and the decontamination effect is good. Newly bought wooden furniture often has a pungent smell of paint, and after scrubbing it with tea a few times, the smell will subside, which is better than detergent.

Can you drink overnight tea, in life, there are many people who love to drink tea, because they like or are afraid of waste, the tea of the previous day is reluctant to be poured out, and continue to brew and drink the next day, but this is very harmful to the human body, so can you drink overnight tea, what are the harms?

What are the dangers of overnight tea

1. Oxidation of tea polyphenols

In life, when theaflavin, the antioxidant in tea leaves, is soaked out, it will generally show a yellow-green color. When it is left for a longer time, it takes on a yellowish-red color, all because the theaflavins in the tea have become thearubigins. As a result, a cup of turquoise tea will lose its original color, and its clarity will become worse and worse.

2. Vitamin C is reduced

Tea is rich in vitamin C, which is a natural inhibitor of nitrosamines. Although these are said to be very beneficial to the human body, and can scavenge oxygen free radicals, inhibit lipid peroxidation, and have an antioxidant effect. However, when the tea is left overnight and left for too long, a large amount of vitamin C in the tea will be lost.

The nutrients in it will become bacteria and molds to multiply. Nutrients.

3. The nitrite content increases

In life, the longer the overnight tea is left, the nitrite content will rise, causing it to have a certain chemical reaction with the body. Under the action of gastric acid, it will combine with biogenic amines in the stomach to form nitrite, which is likely to produce carcinogens.

4. Bacterial breeding

In life, overnight tea is generally left in the teapot, and even if it is sealed in the refrigerator, it will be invaded by omnipresent bacteria. If it is placed in a teapot, the indoor temperature will be relatively high, and bacteria and dirty things will enter the tea. And overnight tea generally tastes more astringent, has long lost the original mellow taste, and it is meaningless to taste it again, and it is better to drink water if you want to quench your thirst.

1. Induce stones

People often drink overnight tea, which will make the stone disease high, because the tea will form some tiny particles of precipitate during the long-term soaking process, these substances can not be digested and metabolized in time after entering the human body, and will not produce stasis in the human body, and will cause stones after a long time.

2. Indigestion

Cause indigestion, but also an important harm for people to drink overnight tea, because the overnight tea is stored for a long time, he is no longer fresh, and there will be a slight deterioration, at this time the tea soup will produce some bacteria and microorganisms, if people drink spoiled tea with bacteria and microorganisms, it will aggravate the gastrointestinal burden so that the drinker has indigestion, and in severe cases, abdominal pain and diarrhea will occur.

3. Grow tartar

After overnight tea is stored for a period of time, the tea polyphenols it contains will react with oxygen to produce tea rust, people are drinking these tea soup with long sleeves, which will make tea rust stick to people's teeth, and after a long time, it will make people's teeth produce a thick layer of tartar, which will make people's teeth yellow.