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Is boiled water dangerous?
Through a series of experiments, Chinese scientists found that the widespread information about the harm of boiling water twice or more is incorrect. This was reported by the Journal of Water and Health (https://iwaponline.com/jwh/article/18/5/631/75644/Quality-change-mechanism-and-drinking-safety-of).
There are many claims about the harm and even danger of repeatedly boiled water. It is believed that when water is boiled for the first time, harmful chemical compounds begin to form in it, and if it is boiled repeatedly, their concentration increases many times. According to some researchers, water even becomes "heavy" - as if deuterium in it forms an isotope of hydrogen. Heavy water is usually used in nuclear reactors.
To test these claims, Chinese scientists conducted an experiment by repeatedly boiling water. Each time they took water samples and measured magnesium, zinc, aluminum, iron, chromium, mercury, lead, copper, selenium, cadmium, antimony, chlorine, as well as color, odor, transparency, intestinal checked for the presence of a stick.
Only the pH level is slightly increased - up to 8,95 (standards accepted in Russia - from 6,5 to 8,5). This water turned out to be safe to drink. It was only found that repeatedly boiled water tastes much worse than plain water.
According to scientists, drinking boiled water cooled or warm is better for health than tap water. Because boiled water effectively kills pathogenic microorganisms and reduces disinfectant residues.
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