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Can you drink the water after boiling for the second time?
Books say that the night of the cold water should not be drunk, in fact, in life many people drink the night of the cold water, should not have any effect, and then burned again, certainly no problem.

Occasionally drink a few mouthfuls of no problem, as long as it is not often drink, and not repeatedly boiled water will not have carcinogenic. It is not recommended to repeatedly boil water to drink, such as water in a large boiler, because the water in the repeated boiling, the water of silver nitrite, nitrite ions and arsenic and other harmful substances in the concentration of the relative increase. After drinking long boiling water, it will lead to the combination of low iron hemoglobin in the blood into high iron hemoglobin that cannot carry oxygen, thus causing blood poisoning.

1, boil twice the water can drink.

From a health point of view, boiling water can be burned for a second time, we usually say that we can not drink "a thousand boiled water", not that the second boiling water, but repeated many times to boil the water, water in the boiling will be part of the gasification, repeated many times to boil will lead to a large number of minerals remain in the remaining water, the concentration is very high, after drinking will increase in the water. Concentration is very high, after drinking will increase the risk of liver, kidney, stomach, intestinal stones, and boiled twice the concentration of minerals in the water is completely less than the concentration of disease-causing, you can drink.

2, overnight boiled water can not burn the second

Ordinary life can not drink the second boiled water, said the overnight water or long-term storage of boiled water again. Overnight boiled water, that is, the first day of boiling water, placed in a container after a night to come back to boil, such boiled water is called overnight boiled water. Because boiled water and other food, like, should not be stored for a long time, overnight boiled water by re-heating there will be a certain concentration of nitrite, this component belongs to the carcinogenic substances, although the concentration is not high, but repeatedly boiled after the concentration will be high, if you drink for a long time will gradually be enriched to the point of causing disease.