Is it harmful to boil hot water repeatedly?

I believe everyone should know that if you only drink raw water, it will easily cause problems to your stomach and intestines because it is rich in bacteria and other harmful ingredients. So generally speaking, when drinking water, everyone has to boil the water until it becomes boiled water before drinking. Because boiling water can effectively kill bacteria in raw water, but if the unfinished boiled water cools down and is boiled repeatedly, will some harmful ingredients be produced in it?

Is it harmful to boil water repeatedly?

1. After the cold boiled water is boiled for the first time, although the nitrite content will increase, the amount will not affect our health. However, after boiling it many times, the nitrite content will increase exponentially. Such water cannot be drunk frequently. If you drink this kind of water frequently, you will experience dizziness or poisoning reactions. Therefore, we recommend that you pour out the boiled water and heat it with new water.

2. The nitrite produced by repeated boiling of cold boiled water will react with the stomach acid in our body to form a substance called ammonium nitrate, which is carcinogenic.

How much water is appropriate to drink

The most suitable temperature is 10-30 degrees Celsius. On the one hand, consuming cold drinks will cause the gastrointestinal mucosa to suddenly feel cold, causing the originally open capillaries to contract and the smooth muscles to spasm, which can cause gastrointestinal discomfort or colic or even diarrhea. On the contrary, some people like to drink boiling water. It is a conclusion in the medical community that overly hot food entering the esophagus will damage the esophageal mucosa and stimulate mucosal hyperplasia, thus inducing esophageal cancer. Therefore, the temperature of drinking water should not be too hot or too cold.

Feeling thirsty is a sign of dehydration. It is best not to feel thirsty during the day. Know how to drink water. One sip of water cannot feed all the dehydrated cells in the body. Drink 200 ml of water each time, and drink it slowly and continuously at one time. Establish a drinking schedule and drink water at regular times and in regular amounts. Drinking water in the morning and evening is necessary because the blood is viscous at night. It is not good to drink light salt water in the morning because blood pressure is highest in the morning. It is best to drink boiled water. Drinking water is not only necessary for the human body, but also has therapeutic effects under certain circumstances.

Notes on drinking water

Drink light, not sweet

What you lose through sweating in summer is not only water, but also minerals, vitamins, amino acids, etc. Therefore, when the weather is hot, you should drink some light salt water to supplement sodium. Homemade mung bean soup, lemon water, etc. can not only relieve heat and reduce body temperature, but also supplement vitamins and other nutrients. It should be noted that various sweet drinks are high in sugar, high in energy, and have relatively monotonous nutrients. It is not recommended to drink them in large quantities, and they cannot be used to replace boiled water.

Drink slowly, not quickly

When drinking water, many people are accustomed to "guzzling" it, but this way of drinking water is not good for health. Drinking a large amount of water quickly will quickly dilute the blood, increase the burden on the heart, and make it easy to swallow a large amount of air, which can easily cause hiccups or bloating. The correct way to drink water is to hold a mouthful of water in your mouth and swallow it slowly in several times. This will fully moisturize your mouth and throat and effectively relieve thirst.

Drink early rather than late

When you feel thirsty, irritable, weak, or have a headache, it means that your body's cells have begun to dehydrate, and drinking water at this time is "passive drinking." Over time, the human body will be in a potential state of water shortage for a long time, which is not conducive to normal metabolism. Therefore, drinking water, like eating, also needs to be done at a regular time, and passive drinking should be changed to active drinking, and you should drink water before you feel "thirsty".