This is the reason why you should never boil the same water twice

If you’re the sort of person who’s conscious of not wasting resources, it’s tempting to fill up the electric kettle once and keep boiling the same water over and over again until it’s empty. Well, you might want to opt instead for just as much fresh water as you need for just that one cup of tea.

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Flickr/tellumo

But why? It’s just water. Boiling it purifies it, after all. So giving it a second boil should make it all the more sterile, right? Nope, in fact he exact opposite is true.

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Flickr/myrtti

Let’s take a closer look at what happens when water boils. At first glance, you see it bubble and steam, but there is also something happening at the chemical level. By cooking the same water multiple times, the oxygen content changes and potentially dangerous substances accumulate. You can really taste this with tea. Tea brewed with fresh water tastes very different to water that’s been re-used.

Boiling water is a great way to kill bacteria, that’s true. But when you boil water over and over again, dangerous gasses and poisonous substances like arsenic, nitrates, and fluoride can form as a result of the changed chemical structure. Various studies have shown a connection between this fluoride and the damaging effects it has on the nervous system and brain.

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Twitter/OysterHC


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