Caffeine: Why it Will Dehydrate You

Posted on December 17th, 2007 by Brandon Harshe

When people speak about the dangers of caffeine, dehydration is usually not one of them. The usual suspects of dangers include addiction (it’s the most addictive drug in the US), fatigue, and exhaustion. If you don’t believe me, you can always read this.

But what I want to convey is this: caffeine, on top of all it’s other dangers, is also considered a diuretic.

What is a diuretic?

According to Wikipedia, a diuretic is "any drug that elevates the rate of bodily urine excretion." In layman’s terms, it makes you pee more.

So what’s the big deal? You might be thinking "Doesn’t peeing more mean that I’m getting enough water to drink?"

No, not exactly. What it means is that, as a diuretic, caffeine basically rids your body of any and all excess water, making your cells crenate (shrivel up). To give you an indication of how serious it is, professional bodybuilders get disqualified from competition for using diuretics, but not the majority of steroids. However, it should be known, that pro bodybuilders use it for a competitive advantage, so it’s a ban based on cheating more than health.

The reason why I bring this up is that people in this country don’t drink enough water. I didn’t believe it until I’ve had the chance to observe some people close to me recently. One of these people will wake up and grab an iced tea on the way to work, drink diet soda during the day, more iced tea, coffee in the afternoon to keep going, iced tea on the way home, and never once touch a glass of water during the day. This person tends to be a go, go, go type of person, and it’s obvious why.

We’re all told to drink 8 cups of water a day minimum. In my opinion, that is way too low, especially where we live. Being in Arizona, the minimum someone should drink is 8 pints of water (1 gallon). The summers get way too hot and dry here for people to drink any less than that, but they do. Every summer, I hear about people dying of dehydration out here. Usually it’s elderly people who are incontinent, but other times it’s not. I just don’t get it.

If we are 70% water ourselves, doesn’t it make sense to keep that number where it is?

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10 Responses to “Caffeine: Why it Will Dehydrate You”

  1. Jamie Says:

    Interesting. Caffeine really is addictive. If I stop drinking tea or coffee I really do crave it. I’ve recently been drinking more water and feel better!

  2. Amy Says:

    I think that caffeine in very small doses (like the equivielent of 1/5 of a cup of coffee) is actually beneficial during VERY vigorous exercise…I’m talking major endurance things. A small shot of caffeine, from a good source, will increase the efficiency of energy use.
    But yeah, large doses of caffeine on a regular day is really so not good.

  3. Staci Says:

    I like this it makes sense now to me why most brand name chocolates are so addicting. When I was pregnant with my first child we did the research by calling all the major companies or writing them. They all admitting to adding caffeine to the chocolate but because it was less then six percent they did not have to list it. Hmmm… sneaky!

  4. Brandon Harshe Says:

    Amy: That is a good point about the exercise. I can agree with that, especially when running marathons or really strenuous exercise in the gym.

  5. Brandon Harshe Says:

    Staci: That means you should stop eating chocolate! :D

  6. Amy Says:

    Brandon…Staci should stop eating chocolate?!?! You’ve lost your mind!!!! :)

  7. Brandon Harshe Says:

    Amy: I’ve been accused of losing my mind in the past. :lol:

  8. Staci Says:

    Don’t even think for one minute anything you say will get in between me and my chocolate. We are together forever!

  9. The Carnival of Nutrition and Fitness | Nutrition Fitness Life Says:

    […] Harshe presents Caffeine: Why it Will Dehydrate You posted at The Skinny on January. Brandon writes about caffeine’s dehydrating […]

  10. Jenny Davis Says:

    I actually can’t stand coffee, so that’s not a problem. But I’m with Amy… cut out chocolate? You have to be crazy!

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