People like us don’t mind if we reheat a previously boiled water. However “reboiling” water could be harmful to your health.
We all believe that boiling the water purifies it. Giving it a second boing should make it more sterile that is what we think. In fact, it could be the exact opposite here’s why.
When you boiled the second time it looks like the same the bubble will start to rise and the water will steam. However, there is something happening at the Chemical Level. The Oxygen content changes and could now be harmful to your health.
We do know that boiling water is an incredible way to kill bacteria. But when you boil water over and over again, harmful gasses and poisonous substances like nitrates, arsenic, and fluoride can form as a result of the changed chemical structure.
If you have perfectly pure distilled deionized water, nothing will happen even you reboil it. However, ordinary water contains dissolved mineral and gasses. Also, there are studies have shown a connection between this fluoride and the harmful effects on it to the nervous system and brain.
Always remember that the minerals found in water don’t evaporate. So, if you were to boil water over and over again until it had all evaporate, you’ll eventually find a crust of minerals is still there. After this process, it really isn’t just a normal drinking water anymore and the minerals that are actually good for you, like calcium, can create problems, which can form kidney stones.
Can reboiling water cause cancer?
If we reboiled the water could it lead a person to develop cancer? This concern is not baseless. While the boiled water is fine, increasing the concentration of toxic substances may put you are a risk for certain illnesses, including cancer. For example, excessive intake of nitrates has been linked to methemoglobinemia and certain types of cancer. Arsenic exposure may produce symptoms of arsenic toxicity, plus it has been associated with some forms of cancer. Even “healthy” minerals may become concentrated to dangerous levels.
The Bottom Line: Generally, boiling water, allowing it to cool and then reboiling it does not present much of a health risk.
For example, if you keep water in a tea kettle, boil it and add water when the level gets low, you aren’t likely to endanger your health. It’s best if you don’t let water boil down, which concentrates minerals and contaminants and if you reboil water, it’s better to do it once or twice, rather than make it your standard practice.