Can you drink the cool boiled water overnight in summer?

After getting up in the morning, drink a cup of cold and white, which is good for health. Many people like to dry a glass of boiling water the night before and drink it again the next morning. This is okay when the temperature is not high; For example, in summer, when the temperature exceeds 30 degrees Celsius, the air humidity is high, and the bacteria multiply quickly, the cold boiled water overnight will lose its biological activity, and it is very easy to be contaminated and cause diarrhea.

You can pour half a small cup of boiled water the night before, then cover the lid, and mix the boiling water with warm water the next morning.

In addition, the time of cooling and boiling should not be too long, and the boiling water boiled on the same day is best drunk on the same day.

Some Weibo netizens said that after three days of storage of boiled water, nitrous acid can be produced, which can make people dizzy, nauseous and vomiting after drinking. If it is stored for a longer time, it will combine with amines and become ammonium nitrite, which will promote stomach cancer, liver cancer, and esophageal cancer. Bottled mineral water and purified water are the same for more than 3 days, and bacteria multiply in large numbers, which is not as good as tap water.

After the rumors passed through netizens**, the more "evil" they became.

Liu Wenjun, a professor at Tsinghua University's School of Environmental Sciences, thinks this statement is a bit alarmist. In fact, the amount of nitrite in the water is very small, and it is usually oxidized to nitrate, so this claim is unfounded. In fact, boiling water is a good habit of the Chinese people, which can greatly protect the health of the body, play a good role in disinfection, and kill the pathogenic microorganisms.

Therefore, boiling water is necessary for China, especially when the drinking water safety is not particularly good. When bottled water is opened for a long time, it can be contaminated by microorganisms, which may cause diarrhea, but it will not cause cancer. There is no basis for the claim that nitrosamines are produced.

The preserved ones are drinkable. However, it is best not to drink the cup when it is left uncovered overnight, because you are not sure whether it has been contaminated by bugs or other things.

1. In the process of standing, the cool white boil in the cup will absorb carbon dioxide in the air, and the resulting carbonic acid will reduce the pH value of the water slightly, although it will affect the taste, but it will not harm health.

2. It is rumored on the Internet that there is a large amount of nitrite in the overnight water, which is wrong, although there is nitrite in the overnight water, the amount is very small and will not have any impact on health.

Nitrite is not produced out of thin air, but is converted from nitrate in water under certain conditions:

Thermal decomposition: When drinking water is repeatedly heated, nitrate can be thermally decomposed and converted into nitrite;

Bacterial contamination: Drinking water is left in the air for a long time and reduced to nitrite under the action of microorganisms.

It is best not to drink overnight boiled water in summer, because overnight boiled water will breed a lot of bacteria after a night, and it is not good for the body if you drink it.

Water is drinkable overnight, only "overnight tea", no "overnight water".

Once sealed, you can drink it. If it's not sealed, then go buy a bottle of water to drink.

Try not to drink it, it's not good for your stomach.

You can drink it, but you really can't drink a thousand boiling water, boil it once (boil tap water, etc.) to precipitate some calcium and magnesium in the water into scale, and they will dissolve into water if you burn them a few times, which is harmful to the human body, you don't think it is calcium supplementation, its existence form is not good for the human body, if you have studied chemistry, you will understand. If there is pure water in the water dispenser, there are no ions in these ions, so don't worry, if it is mineral water, you have to take a good look at it.

Therefore, if you want to drink water, you would rather reheat the water than boil it. Freshly boiled water, open the lid to let the mist come out, because in order not to produce bacteria in the pipeline transportation process, the water contains a small amount of dissolved chlorine, after boiling, open the lid to let some chlorine gas volatilize, so as not to re-dissolve into the water. Of course, chlorine is easily volatile, and a small amount of chlorine in tap water generally does not cause health damage to people.

Just pay a little attention to yourself.

I studied water supply and drainage, believe me, our major has learned about water supply and drinking water health, remember to adopt it.

Many people think that overnight water cannot be drunk, and many people think that it can be drunk, but can it be drunk or not?

"If the water is left for too long after boiling, it will also become aged water, and the toxic substances in the aged water will increase with the increase of water storage time. Therefore, it is best to drink the boiled water on the same day, and experiments have shown that drinking boiled water that is naturally cooled and left for no more than 6 hours is the most beneficial to human health."

So, it's best not to drink overnight water.

Boiled water left overnight is drinkable.

The chemical composition of the boiled water overnight did not change significantly, such as pH and nitrate. However, if the overnight stay is too long, more than 72 hours, do not drink, because the boiled water is left for too long, the nitrite content will increase, if you drink too much at one time, it is easy to cause some digestive tract adverse reactions.

When choosing boiled water, try to choose the day's fresh boiled water, because boiled water is an important substance to promote human metabolism, if the water quality is not good, it will affect the health of the human body.

Do not drink, overnight boiled water will have a large number of harmful substances, and will also generate a lot of bacteria, if you often drink overnight boiled water, it will have a certain impact on the body.

Boiled water can be drunk overnight, and boiled water left out for 24 to 48 hours is drinkable.

Yes, some people said that overnight boiled water is poisonous, but in fact, this is all rumors, and overnight boiled water can be reconciled.

Can you still drink boiled water overnight? Experts give such an explanation, and after reading it, it subverts your cognition.

It is not possible to cool and boil water overnight, because the nitrogen-containing organic matter in the boiled water for a long time will continue to be decomposed into nitrite, and at the same time, it is inevitable that the intervention of microorganisms will accelerate the decomposition of nitrogen-containing organic matter. It has a strong ability to bind to hemoglobin in the body, and the state can interfere with the normal oxygen transport function of the blood. Therefore, it is best to drink boiled water on the same day.

Nitrite, a general term for a class of inorganic compounds. It mainly refers to sodium nitrite, which is white to light yellow powder or granular, slightly salty and soluble in water. Nitrate and nitrite are widely found in the human environment and are the most prevalent nitrogenous compounds in nature.

Nitrate in the human body can be reduced to nitrite, a precursor substance of N-nitroso compounds, under the action wheel of microorganisms.

Talking about this, I want to popularize with you a problem that should be paid attention to in daily life. Drinking water must not be heated frequently, because frequent heating will lead to a spike in carcinogens in drinking water, especially friends who have water dispensers at home, water dispensers have been in a heated state, and long-term drinking of continuously heated water may cause irreversible damage to our body. Therefore, please pay attention to friends who have water dispensers at home, turn them on when you drink, turn them off when you don't drink, and be responsible for your own health.

Every little thing in life may become the culprit that endangers our health, so we must pay more attention to popular science education to avoid causing harm to the body because of an inconspicuous little habit of our own, and the final gain outweighs the loss, but at the same time, we must also learn to distinguish rumors and believe in science.

Drinking water is something that everyone must do every day, water is a substance necessary for the human body, and the human body needs a lot of water to replenish energy every day. I believe everyone has often heard that drinking 8 glasses of water a day is the healthiest, or that water cannot be drunk overnight, etc., is there really a scientific basis for such a statement? Maybe everyone doesn't know at all, so can you drink boiled water overnight?

Let's find out.

In fact, the overnight boiled water is not long to drink, and the overnight boiled water has some harmful substances, which are often exaggerated. Many people think that you can't drink boiled water overnight, and there is too much nitrite, and the human body will be harmful to health if it consumes too much nitrite.

In fact, the nitrite content contained in overnight boiled water is very low, compared to the amount of leftovers, leftovers or pickles that everyone often eats, it is simply minimal, and overnight boiled water will not cause any damage to the human body, so there is no need to worry too much.

Boiled water is boiled before drinking, the bacteria of boiled water have been completely eliminated in the process of boiling, even if it is boiled water overnight, as long as it is placed in an unpolluted environment, it will not produce bacteria, we don't have to worry about overnight boiled water will be infected with bacteria, the general water quality is in line with safety standards, overnight boiled water will not produce carcinogens, you can drink with confidence.

Some scientists conducted a test on the overnight boiled water, and found that the HP value, nitrite and other substances in the overnight boiled water did not change in any way, which is basically normal, and the overnight boiled water can be drunk as long as it is properly stored and does not let dust and flying insects fall into it.

Water is a substance needed by the human body, the purpose of drinking water is not only to quench thirst, the right amount of water can also improve the body's metabolic ability, promote the acceleration of blood flow, so that the body's metabolism is in a normal state, as long as we drink water scientifically, water will basically not bring any harm to the human body.

According to the results of relevant experiments, boiled water overnight can be drunk, and it does not produce bacteria, so it has little effect.

Overnight boiled water will breed bacteria after a long time, so try not to drink overnight boiled water. In order to avoid the breeding of bacteria, it is easy to have abdominal pain and diarrhea after drinking, and there will be no big problems, mainly gastrointestinal inflammation, and long-term drinking is not conducive to physical health.

As long as the overnight boiled water is not more than 72 hours, you can drink, because if the boiled water is placed for too long, the nitrite content will increase, which will easily lead to some adverse reactions of the digestive tract, so usually when choosing boiled water, try to choose the same day, fresh boiled water is better, because boiled water is an important substance to promote human metabolism, if the water quality is not good, it will affect the health of the human body.

Boiled water overnight is actually drinkable. After the water is boiled, the bacteria can basically be eliminated, and the cup with a lid is generally used, which is equivalent to a sealed environment, and the growth of bacteria is very slow, so even if it is cool and white overnight, there is no need to worry.