Expert: Fred E. Brunetti CWSV - 1/24/2007

Question
I heard from friends that reboiling water that has cooled causes hardening and thereby less easily absorbed by our bodies. Is this true? I use a basic water filter and i boil the filtered water for drinking. However sometimes i  reboil abit of the cooled down boiled water in the kettle for making tea/coffee. My friends say its advisable to pour away the cooled down water and add fresh filter water to boil.

Answer
Hi Yong;
Thank you for asking.
The simple answer to the 'is it true' question is no it is not true.
The reason to boil water for drinking is to assure its bacteriological safety.
If you notice that when you boil your water you see a sediment or deposit on the vessel you are boiling the water in then your water was probably hard water to begin with. Hardwater,that is water with calcium and magnesium dissolved in it, has no measurable nutritional value to us. If you boil the hardwater the minerals in it do not become less available than they were in the first place!
I do not know what kind of filter you are using so I can't say what you are filtering out. For drinking water I prefer to use distillation or reverse osmosis followed by ultra violet light. These processes would be the best to assure water's drinkability. It would assure that the water can do the job it is designed for and that is carrying nutrients to your cells, carrying undesirable things out of your cells and maintaining the moisture balance in your body.
I hope this helps.
Best Regards, Fred