At the same time, what kind of water is absolutely inedible?

1, a long-standing boiled water

If boiled water is left for a long time, the nitrogen-containing organic matter in it will be continuously decomposed into nitrite. In particular, boiled water stored for a long time is bound to be contaminated by bacteria. At this time, the decomposition of nitrogen-containing organic matter will be accelerated and more nitrite will be formed. After drinking such water, nitrite will combine with hemoglobin and affect the oxygen transmission function of blood.

Therefore, the boiling water in thermos bottles for many days, the residual water that has been boiled for many times, and the water that has been boiled for a long time on the stove have all changed in composition and cannot be drunk. You should drink boiled water for no more than 24 hours. In addition, bottled and barreled purified water and mineral water should not be stored for too long. Bottled or barreled purified water and mineral water should not be drunk for more than 3 days.

Step 2 drink

It is best not to drink juice, cola, soda, coffee, milk and other drinks in the first glass of water in the morning. Most carbonated drinks such as soda and cola contain citric acid, which will accelerate the excretion of calcium during metabolism and reduce the content of calcium in blood. Long-term drinking will lead to calcium deficiency. Other drinks are good for urination. Drinking water in the morning can not only effectively replenish the water that the body lacks, but also increase the collective demand for water, resulting in water shortage in the body.

Fruit juice, milk and coffee should not be used as the first cup of drinks in the morning, because these substances can not provide the most needed water for the body at this time, but also make the body digest and absorb the gastrointestinal tract in a state of water shortage, which is not conducive to health.

Step 3 tap water

Some people are used to getting up in the morning, turning on the tap and drinking a glass of tap water, which is not right. The tap water that has been stopped all night and the tap water in the water pipe are still. This water, the metal pipe wall and metal cavity of the faucet will produce hydration reaction, forming metal polluted water, and the residual microorganisms in tap water will also multiply in large quantities. This kind of water contains a lot of substances harmful to human body, and may also contain Legionella, an acute respiratory infectious disease that threatens human health.

So when you turn on the tap in the morning, the tap water that comes out at first is inedible stagnant water. People who have this habit should correct it immediately so as not to damage their health.