Pure Water Can KIll You

Fact of the day #1

Drinking absolutely pure water can kill you. All the water we normally drink – from taps, from bottles, from the garden hose – contains impurities which affect a property of water called tonicity. This is the ability of a solution to draw or repel water from ajacent solutions when separated by a membrane. Solutions that are hypertonic gain water, while hypotonic solutions lose water. Drinking water, which we usually think of as pure, really contains a whole mess of salts and sugars which make it slightly hypertonic. They also give water its taste. The cytoplasm in the cells of your body also have a tonicity. So, when they are exposed to hypertonic solutions, the cells themselves lose water and shrivel up. When they are in hypotonic solutions, they gain water, swelling up and bursting like a balloon. Absolutely pure water -with no impurities at all – is the most hypotonic solution. So, if you drink enough of it, your cells will start absorbing water. This disturbs the balance of electrolytes (electrically conductive ions) in your body. This is most seriously a problem in the brain, where water poisoning can lead to brain damage, coma and even death.

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4 thoughts on “Pure Water Can KIll You

  1. I always had a feeling I shouldn’t drink the deionised water in the lab despite the fact it’s completely sterile! Surely drinking too much tap (‘ionised’) water does this to you too? (but you’d need to drink more I guess).. like some of those poor people who take ecstasy and then think they’re insanely thirsty and end up drinking tonnes and bursting their neurons..

  2. This article is absolute nonsense and poorly explained. I’ve been drinking pure water (TDS of 1 ppm) for 28 years and have no illness whatsoever more to the point I’m never I’ll – the same goes for my family friends and thousands of customers all of whom drink pure water. Our natural source of water is rain not contaminated water from municipal treatment plants. If there were an ounce of truth in your article then we’d have had mass deaths everywhere north of Manchester where water measures 10-20 ppm TDS. My guess is that you are talking about 18meg water for lab use in which case you should explain your theory more precisely instead of scaremongering. The fact are different to how to describe them 12-15 meg water is perfectly safe to drink. If it isn’t why have millions of people who’ve drunk it for 35 years avoided illness? The answer is because it’s actually the safest water to drink and what we evolved in ( rain ) get you facts right before making stupid comments on the net

  3. Dude, rain water is contaminated by atmospheric elements.

    The article is talking about absolutely pure water, which does NOT occur naturally.

  4. Roger, funny you tell others to get their facts straight before publishing stupid comments….

    When this author discusses pure water, he is not talking about its source (rain versus tap), but rather its chemical composition. Rain water is certainly not harmful for you! But Roger, that is because it is just like the water you get from the tap; impure. From the level of intelligence you expressed in your comment, I know this may be a little hard for you to understand, but even though you can’t SEE things in your water, that doesn’t mean they aren’t there. There are (like the author expresses) a whole host of salts and minerals and even some bacteria in there. Who’d have thought! I should know, I worked in a water testing lab for a pharmaceutical company…

    What this article is talking about is WFI (water for injection) or RODI (Reverse-osmosis de-ionized) water. These types of water have been highly filtered to make them chemically pure (~100% H2O molecules) in order to be used in labs for pure chemical reactions and to make safe medicines. They are certainly NOTHING CLOSE to the chemical composition of rainwater, which has many, many more impurities.

    Does this help Roger?

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