Is it okay to drink water that has been boiled repeatedly?

　　Is it okay to drink water that has been boiled repeatedly?

　　According to experimental evidence, if water is boiled repeatedly, the "nitrate" in the water will be converted into "nitrite", and "nitrite" will turn the hemoglobin in the human body into "nitrite-based hemoglobin", causing the red blood cells to lose their ability to carry oxygen.

　　Therefore, if you regularly drink boiled water, it may cause tissue hypoxia, shortness of breath, chest heaviness, lips and nails turning purple, or making you prone to sleepiness. If it is more serious, after "nitrite" enters the body, it is likely to be converted into carcinogen "nitrosamines" through the action of gastric acid.

　　Repeated boiling of water at home will destroy the trace elements that are beneficial to the human body, leaving only impurities that are harmful to the human body. Therefore, drinking it is harmful to the human body. Even if the impurities are filtered out, drinking it is like distilled water, which is not good for the body.

　　But on the contrary, even after the water dispenser is powered on, the inner tank will automatically stop heating when the water temperature reaches the boiling point. The heat will never reach the boiling point and will not destroy the trace elements that are beneficial to people. Generally, there is no problem and you can drink it with confidence. There is only one problem. If the water is not drunk in time, it will continue to automatically heat when the temperature drops. At that time, the scale inside will accumulate thicker and thicker, causing minimal harm to people after drinking, and also wastes electricity resources. It is best to regularly clean the scale on the hot water tank inside the water dispenser. Do not leave the power on for a long time without drinking.