How many misunderstandings do you have about drinking water?

How many misunderstandings do you have about drinking water?

Can drinking overnight water cause disease?

The water boiled the night before is placed the next morning, and the water boiled in the morning is placed in the afternoon, which is generally stored for more than 8 hours. There is no difference between the two, and there is no reason why the former can't drink and the latter can.

Therefore, it is not reliable to say that you can't drink water overnight, unless you drink the water left in the cup (always in contact with your lips) until the next day, it is not recommended to drink it ~

Drinking weakly alkaline water is healthier?

We often say that weakly alkaline water means that the PH value of water is slightly greater than 7; The internal environment of human body is relatively balanced and stable, and the PH value is generally between 735 and 7.45. After drinking weakly alkaline water, it will be neutralized in the gastrointestinal tract, and the pH value of the human body will not change because of drinking acidic and alkaline water.

Some drinks on the market are still attracting attention with slogans such as "acidic water" and "alkaline water". Everyone should pay attention to screening and don't blindly listen!

Drink more water after a cold?

When a person has a cold and fever, a lot of water will be excreted in the form of sweat, and at the same time, it will also take away electrolyte components such as sodium and potassium in the body. In this case, it is necessary to replenish water properly, but not only boiled water, but also enough electrolyte components should be supplemented to achieve effective "hydration" effect.

Will boiled water go bad if it is left for a long time?

So will the boiled water that has never been drunk really go bad if it is left for a long time? Researchers have done this experiment: divide boiled water into two groups, one with cover and the other without cover, and leave them for 5, 8, 1 1, 15, 16 17 hours respectively to test whether they contain xijun; The results show that after the experimental time, whether covered or uncovered, the boiling water in each cup is not as thin as yours. It can be seen that the boiled water that has not been drunk will not deteriorate if it is placed for a long time in a short time ~

Can't you drink "boiling water"?

It is said that you can't drink boiled water because the content of nitrite will increase. The researchers did an experiment: boil water in a stainless steel kettle, boil it for 1 time, 5 times and 10 times respectively, then pour it into a cup and cool it, and then let it stand for 0 hour, 24 hours and 48 hours respectively to test the nitrite content in the water. It was found that the content of nitrite in water increased slightly with the increase of boiling times. After standing for 48 hours, the content of nitrite is 0.0 14mg/L, but it is still far from the national standard reference index limit of nitrite 1mg for drinking water. So from this perspective, the so-called "thousand boiling water" can be safely drunk.

Can't you drink water with scale?

After boiling water in a kettle for a period of time, a layer of white scale will appear at the bottom. It is said that this is because the water quality is too hard, and it is easy to get kidney calculi if you drink too much. But in fact, the formation of scale is mostly because water contains more calcium and magnesium ions. China's Hygienic Standard for Drinking Water stipulates that the total hardness of drinking water (calculated by calcium carbonate) should not exceed 450mg, which is equivalent to 180mg of calcium in 10L, while the daily drinking water for adults usually does not exceed 2L, and the daily reference intake of calcium is 800mg. After conversion, it can be seen that normal drinking water will not lead to excessive calcium in the body, let alone induce kidney calculi.