The answer to overnight boiling water, what are the dangers of overnight boiling water What are the

Can drinking overnight boiled water really cause cancer? There is news that the water that has been boiled for a long time cannot be drunk. Overnight boiled water and boiled water, as well as non-same-day boiled water in thermos flasks, contain a substance nitrosamine, which is a strong carcinogen.

Some readers are worried: I have to pour a glass of hot water from the thermos flask every morning after waking up, isn't it drinking carcinogens every day?

In fact, the formation of nitrosamines is not so easy, it requires certain precursor substances and environmental conditions. The most susceptible to the formation of nitrosamines is the gastric juice of humans and animals, and nitrosamines can only be produced when the acidity of the gastric juice is not enough (i.e., the pH value is high). This phenomenon is also called endogenous nitrosation.

The process is that the nitrate ingested by the body is formed nitrite under the action of nitrate-reducing bacteria in the digestive tract, and the nitrite combines with amines, the products of protein breakdown (usually secondary amines, tertiary amines and other amines in food that are prone to nitrosation) to form nitrosamine compounds with potential carcinogenicity.

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That's right, water. In this era when caring for the body has become a popular one, drinking water, which was once considered the simplest, has to become a profound science.

There are several indispensable prerequisites for these processes, namely nitrates, amines, and nitrate-reducing bacteria, all three of which must be present at the same time. The bacteria in the boiled water are basically inactivated, and if the nitrate content of the water itself is in line with the national standard, and it is not polluted by microorganisms and protein substances again after boiling, there is no basis for the formation of nitrosamines. Therefore, there is no scientific basis for the concern that nitrosamines will be produced just overnight.

Yes, but it's best to drink boiled water on the same day.

Regarding overnight water, some people have done such experiments, and the boiled water that has been placed for two or three days is compared with the boiled water of the day for chemical testing, and the indicators of overnight water are within the normal range, that is to say, overnight water is drinkable and will not easily cause cancer.

But even so, experts still recommend drinking as little water as possible overnight, because it can breed bacteria if left for a long time, and the nitrite content in the water rises, which can hinder the normal oxygen transport function of the blood. Therefore, it is best to drink boiled water on the same day.

In the hot summer, you should drink more boiled water, and every time you boil a lot of boiled water at home, you usually continue to drink it the next day, so what is the harm of overnight boiled water? What are the disadvantages of boiling water overnight?

What are the dangers of boiling water overnight.

After boiling water is left for a long time, the nitrogen-containing organic matter in it will continue to be decomposed into nitrite. In particular, if the boiled water has been stored for too long, it is inevitable that there will be bacterial contamination, and the decomposition of nitrogen-containing organic matter will be accelerated, and the formation of nitrite will be more.

After drinking such water, nitrite binds to hemoglobin, which affects the oxygen-carrying function of the blood. Therefore, the composition of the water that has been boiled for many days in the thermos and the water that has been boiled for a long time on the stove has changed and is undrinkable.

Water should be boiled once and not more than 24 hours old. In addition, bottled and barreled purified water and mineral water should not be stored for too long. Large bottles or bottles of purified water and mineral water should not be drunk for more than 3 days.

What are the disadvantages of boiling water overnight?

There will be some microorganisms in the overnight water, compared to the boiled and cooled boiled water, the water quality of the overnight water or the boiled water after more than ten hours is indeed not as good as before.

However, the harm to the body is not great, as long as it is not polluted, just leave it for a night or more than ten hours, the nature of the water will not change.

However, if the water is left for a long time or because of the environment, bacteria will inevitably grow, so people with fragile stomachs or children should avoid drinking overnight water or plain water that has been left for more than ten hours.

OK. After the water is boiled, the bacteria can basically be destroyed, and in clean and tidy air, the growth of bacteria is very slow or even impossible to grow, so even if it is "overnight" cool and white, there is no need to worry about getting infected with bacteria.

Some people say that the overnight water is poisonous and can even cause cancer in the bush, citing the problem of containing "nitrite".

Because the production of nitrosamine substances requires a suitable environment and precursor substances, but the bacterial substances in the water will lose their activity after boiling, and the nitrate content is small, and there is no basis for the production of a large number of nitrosamine substances.

So, overnight boiled water is drinkable.

The shelf life of boiled water circulating on the Internet in the air is only 16 hours, which is only the personal opinion of netizens, and there are no relevant experiments and data to prove it, but boiled water should not be left for too long, even if there is no expiration date, it is best not to drink boiled water after several days.

Drinking overnight water is a drinking habit for many people. However, two primary school students in Beijing proved through scientific experiments that water can be drunk overnight.

In the science and technology museum, they placed the hot water for one day, two days, three days and the water sample of tap water for comparative chemical analysis, respectively, and measured the pH value, phosphate, nitrate, dissolved oxygen, chlorine, chemical oxygen consumption and other values are within the normal range, that is, overnight water does not have any *** for the human body, and can be drunk.

Hello, overnight boiled water is best to drink less or no water.

Suggestions: If the water is stored for too long, it will be infected by bacteria to produce nitrite, once nitrite enters the human body in large quantities, it can make the tissues hypoxic, nausea, vomiting, headache, palpitation and other symptoms, and in severe cases, it can also make people die of hypoxia. Nitrite can also form nitrosamines in the human body, which can promote liver cancer and stomach cancer.

Of course, these are extreme situations and generally do not appear, but for the sake of health, try not to drink overnight water.

Can't you drink water overnight? In fact, it can be drunk, because there will not be a large amount of nitrite in the water, and it is still far from exceeding the standard, so it is drinkable.

"Overnight water can't be drunk" is mainly because overnight water contains chemicals such as zero alcohols, oxyphenols, and hydroxyhydrogen, which can cause diarrhea and even produce carcinogens nitrite.

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?