With the improvement of people's living standards, people are now paying more and more attention to their health. But there are often some people who carry out some pseudoscience under the banner of science. Take the water we usually drink. This one says you can't drink water overnight, that one says you can't drink boiled water, and some say you can't drink yin and yang water. But is it true?

1. Weak alkaline water is healthier. There is no such theory in the mainstream medical field. Like weak alkaline water, oxygen-rich water and cold boiled water, they are all marketing concepts made by merchants in order to sell more water. Drinking water is only to replenish water, and the body's metabolic system will maintain the pH balance of body fluids.

2. overnight water. Some people say that nitrite in the water exceeded the standard overnight. Scientists have done experiments, boiled water for a few days, and detected that the nitrite content in it is far below the national standard. Actually, if you think about it, can't you drink the water cooked in the morning at night? This shows that water can be drunk overnight.

3. Boiling water. The so-called boiled water is the water that is boiled repeatedly. They believe that tap water contains nitrite, which is easy to produce carcinogens under repeated high temperatures. Scientists did an experiment for this. After taking tap water and boiling it for many times, the nitrite in the water is only 0.038mg/L, which is far lower than the national standard1mg/L. So boiled water is drinkable. It is best not to drink overheated water. If the water is too hot, it is easy to destroy the esophageal mucosa. It's not good if the water temperature exceeds 65 degrees. It's best to wait until the water cools to 50 degrees.

4. Yin and Yang water. What is yin and yang water? That is, cold water is mixed with freshly boiled water. The difference between cold water and hot water is that the molecules in hot water move fast and those in cold water move slowly. There are no chemical and physical changes in essence. So yin and yang water can be drunk.

5. Pure water. They say that the pure water is filtered too clean, and all the minerals are filtered out, which is not good for your health. In fact, for drinking water, there are few minerals in the water. For the body, just replenish water. It is enough to supplement minerals in the food we eat every day.

6. Plastic bottled water cannot be drunk after exposure. At present, there is no scientific evidence that food-grade plastic packaging can cause cancer. At present, most plastic bottles filled with water on the market are made of polyethylene terephthalate, and generally no plasticizer is added. This is a high molecular weight substance and will not be easily transferred to food. The temperature below 120 degrees is very safe. Even in hot summer, the temperature inside the car will not reach 120 degrees. So you can drink it safely.

Water is the source of life. Drink healthy water. Don't believe rumors.