Will drinking hot and cold water together cause poisoning?

Many people have had this experience: when they are thirsty, they can't wait for the hot water to cool down, so they add some cold water to drink. However, this common behavior has recently been criticized online for mixing hot and cold water in a water dispenser and drinking it may cause poisoning or even cancer. Is this statement scientific? Please share it with your office workers.

It is a very common phenomenon to drink alternating hot and cold water from a water dispenser. Some people started collecting water before the water was boiled. Or after you have filled up the boiling water collection but don't want to wait, you can just fill up some mixed hot and cold water. Some people first collect a little boiling water and then add a little cold water for immediate drinking. Although the repeated alternation of hot and cold water will increase the chances of bacterial reproduction, the scientific community has not yet reached a consensus on how harmful drinking a mixture of hot and cold water is to the body.

Whether the alternating hot and cold water from a cold drinking fountain is harmful to the body depends most on the quality of the bottled water. If the quality of bottled water is guaranteed, then there is no problem in drinking a mixture of hot and cold water from a water dispenser. If the quality of bottled water is not up to standard, or if the tap water is filtered directly through a filter barrel on the water dispenser, then drinking hot and cold water alternately may be poisonous to the body. Because in this case, cold water is "raw water" containing a large number of bacteria.

What is Yin-Yang water? What harm does drinking Yin-Yang water have on the human body?

In traditional Chinese medicine or folk remedies, it refers to a mixture of cold water and boiled water, or well water and river water. It is mainly used to mix medicines or as a medicine inducer, and is rarely drunk directly.

Nowadays, there is another definition of Yin and Yang water. One refers to the water mixed with raw water and boiled water. When the water in the automatic water heater is insufficient, it will automatically add water. At this time, if the person receiving the boiled water is not paying attention or is in a hurry to drink it, yin and yang water will flow out of the electric water boiler. Yin-Yang water may contain various pathogenic microorganisms, so drinking Yin-Yang water may cause various intestinal infectious diseases. Yin and Yang water is mostly produced in float-type water boilers with a single-cylinder structure. Today's boiling water boilers adopt a double-cylinder structure to separate boiling water from raw water.

Many people come into contact with yin and yang water in their daily lives. For example, a large part of us drink water from water dispensers. When the water level in the automatic water heater is insufficient, it will automatically add water. At this time, if the person receiving the boiled water is not paying attention or is in a hurry to drink it, yin and yang water will flow out of the electric water boiler. If the water is untreated, and the water directly from the tap is mixed with boiled water, this yin and yang water will be harmful to the body after drinking. Undisinfected water not only contains a large number of bacteria, but can also cause gastrointestinal dysfunction and even cholera. The bottled water we usually drink, which is treated, clean, and directly drinkable water, is mixed with boiled water to form yin and yang water. It has not been proven that drinking it is harmful to the body. However, you must ensure that the water dispenser is clean, clean it regularly, and find some trustworthy bottled water merchants.

What is thousands of boiling water? Is the water repeatedly heated in a water dispenser thousands of boiling water?

Thousands of boiling water is water that has been boiled on the stove overnight or for a long time, as well as water that has been boiled repeatedly in an electric water heater. It is generally believed that this water has been boiled for too long and contains high levels of non-volatile substances such as calcium, magnesium and nitrite. If you drink this kind of water for a long time, the harmful substances in the water will interfere with your gastrointestinal function, causing temporary diarrhea and abdominal distension; the toxic nitrite can also cause hypoxia in the body, and in severe cases, it can cause coma, convulsions, or even death. This kind of water is generally not edible and can only be used for extracting harmful substances from the water for research.

The highest temperature reached by a water dispenser when heating water is 90℃, which will not boil. Therefore, there is no such thing as "thousand-boil water". Repeatedly heating water stored in the tank for a long time will not have a fundamental effect on the water quality, but the mineral elements in the water may be reduced or lost.