And a series of physiological metabolic processes in human body are also inseparable from the participation of boiled water, such as the digestion and absorption of food, the excretion of metabolic waste, the hydrolysis of starch and protein into amino acids, etc. If the human body is short of water, it can only survive for a few days. Therefore, it is very beneficial to keep your body hydrated at all times. A healthy adult needs to consume about 2500 ml of water every day to maintain normal metabolism. But for drinking water, many people find that it seems that only China people are particularly keen on drinking hot water. Many foreigners drink ice water. Aren't they afraid of getting sick?
First of all, hot water is definitely not what we understand as boiled water. Drinking 100℃ water will only cause burns to our oral mucosa. Moreover, some research results show that whether it is drinking water or food, if the temperature exceeds 65℃, it is very easy to cause esophageal cancer, which is not conducive to health. So we usually say that hot water is about 50 degrees, warm water is equivalent to human body temperature, and ice water is below 0 degrees.
In fact, it is better to drink hot water or cold water, and some scientists have studied it. By letting some volunteers drink hot water and cold water respectively, the results of measuring their nasal mucus velocity and nasal airflow resistance show that. Drinking cold water will thicken the nose, make people breathe less air, and it is more difficult to pass through the respiratory tract. In contrast, drinking hot water helps to relax the nasal cavity. Therefore, for people with physical diseases, such as cold and stuffy nose, it is best to drink hot water, otherwise cold water will only aggravate your stuffy nose.
Moreover, some studies have found that drinking cold water not only has a certain influence on our nose, but also may cause some interference to our nervous system. When a woman has had a migraine attack, she is twice as likely to have a headache after drinking some cold water. Moreover, in life, headache caused by drinking cold water is also a common phenomenon among women. The results show that this may be because the human body reacts to the sudden change of temperature in the gastrointestinal tract after drinking cold water, which leads to a certain impact on the nervous system.
In fact, many people abroad like to drink hot water, the main reason may be caused by different constitutions. First of all, in terms of diet, many foreigners eat more foods with higher calories, so their physique is also relatively hot, and this kind of hot physique that often eats meat and drinks some ice water should not do much harm to the body. But the consequences are also obvious, that is, we often see that many foreigners are very obese. This may be because drinking ice water for a long time leads to stagnation of cold and dampness, stagnation of qi and blood, which will of course make people extremely obese.
For China people, our usual diet is mainly carbohydrates, so the stomach is weak, so this is also the reason why many people have stomach discomfort after drinking cold drinks. Drinking cold water often is very easy to induce cerebral hemorrhage for those who suffer from stomachache, hypertension and cardiovascular and cerebrovascular diseases.
In fact, drinking cold water is not useless. For drinking cold water, it depends. For example, when the human body is exercising, it is more suitable for drinking cold water. Some research results show that people's body temperature will continue to rise during exercise, and drinking appropriate cold water at this time is conducive to regulating body temperature, heart rate and physiological pressure. But for China people, it is better to drink more warm water without strenuous exercise and high temperature. If they are not in good health, they should drink more warm water. Moreover, after the water is boiled, many pathogenic bacteria and parasite eggs in the water can also be killed, which is safer.