As long as we put the boiled water in a proper place, for example, in a thermos, overnight water can be drunk healthily. For example, mineral water is isolated from external pollutants, so there is no problem in keeping it for a few months and a year. Boiled water has actually removed most harmful microorganisms, so it is actually cleaner water.

under normal circumstances, even the water that has been boiled for many times is still low in nitrite, which will not exceed the standard and will not cause so-called health hazards. Can bacteria grow in boiled water overnight?

Of course, it is possible. If bacteria pollute the water, they will multiply and grow in the water. If we drink boiled water with pathogenic bacteria, it may cause diseases. But first, in boiling water, most pathogenic bacteria will be killed by high temperature of 1℃.

In the process of boiling and cooling, whether bacteria will be polluted and bred in the process of overnight storage is closely related to the storage environment of boiled water, whether the container is clean and the way of storage. Will there be nitrite if boiled water is left for a long time?

Let's talk about the saying that there is nitrite in boiled water for a long time. In fact, nitrite is terrible because it is a carcinogen, which may be caused by long-term consumption. The production of nitrite must be based on nitrate. Take ordinary tap water as an example, the minerals and trace elements contained in it do not include nitrate, and nitrate is not produced out of thin air, so nitrite is even more out of the question.

Strictly speaking, the tap water we drink every day has been standardized, and the nitrate content is in line with national standards. It should be impossible to produce nitrite exceeding the standard, so you don't have to worry about it. It's a bad habit to reheat the leftover boiled water < P > Because repeated boiling will lead to the aging of water, which will not only make the minerals beneficial to human body lose, but also may produce some harmful substances such as nitrite. Once nitrite enters the human body in large quantities, it can make the red blood cells in the blood lose the function of carrying oxygen, resulting in tissue hypoxia. People who drink this water for a long time will have symptoms such as nausea, vomiting, headache, purple nails and lips, palpitation, etc., which can even cause hypoxia and even induce cancer. Conclusion

Nowadays, more and more women pay attention to drinking water. But there are only a few people who can really drink. Drink without picking the time, regardless of the content, and without thinking. Can only prove that you just drink water, but you don't necessarily drink the right water. In this age when caring for the body has become popular, drinking water, once considered the simplest, has to become a profound knowledge.