DO NOT DO THIS: You Can Develop Kidney Stones, Hardening of the Arteries, Arthritis, and Gallstones – Here’s Why

Many of us do this practice when boiling water, mostly in breakfast, but have you ever wondered what happens to water chemistry when you reboil water? Is it still safe to drink? Here’s the answer to the question.

This is what happens when you reboil water. The chemistry of the water changes when you boil it because this drives off the volatile compounds and dissolved gases.

If you boil the water too long or reboil it, it will concentrate certain undesirable chemicals including nitrates, arsenic, and fluoride.

There is a concern that reboiled water may lead a person to develop cancer.


Increasing the concentration of toxic substances also increases the risks of cancer and other chronic diseases such kidney stones, hardening of the arteries, arthritis, and gallstones.

Prolonged excessive intake of calcium salt, commonly found in drinking water and mineral water, can lead among the diseases stated above, excessive intake of nitrates is linked to methemoglobinemia, arsenic exposure may cause arsenic toxicity.

Even healthy minerals may become concentrated to dangerous levels and can cause fatal risks to health.

The bottom line of this is that you should not keep the excess boiled water in the kettle, it’s best to just to pour it out into the sink and boil new.

Do not endanger your health especially those who are pregnant and persons at risk for certain illnesses, they are very prone to the risk it might give, therefore be cautious and do not reboil water ever again.

Source: Anne Marie Helmenstine, Ph.D.