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How Caffeine Works

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Uploaded by on Mar 9, 2007

A GPS receiver uses signals from satellites to pinpoint its exact location on Earth, any time, anywhere. It can tell you where you are, where you've been, where you're going and what time you'll get there. Find out how the Global Positioning System lets you find your way around the globe. Credits: , HowStuffWorks

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Howto & Style

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Top Comments

  • I LOVE CAFFEINE!!! The best drug in the world!!!!

  • PENIS

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  • More to story also amplifies sympathetic nervous activity

  • No, that is not how caffeine works, read Caffeine Blues and you'll know.

    That's how caffeine blocks adenosine.

    Caffeine also raises cortisol levels, that raises blood sugar levels, and leads to adrenal fatigue, it also makes the kidney dump minerals into the urine, it also raises dopamine that lead to chemical dependency, and withdraw symptoms when not taken, and many other problems.

    It is a dangerous and unregulated drug that people put in soft drinks for kids, isn't it CRAZY???

  • lol at the end of the video i tought he said : I'm Marshmallow Brains and that is how stuff works XD

  • i need to remember this video cuz my college roommate drinks 2 cups everyday and at night he barely sleeps

  • i drank almost 1000mg yesterday hehehehehe

  • looks like i wont be needing 5 hour energy.

  • @Jameslikespudding amazon

  • @ThereminWeirdo no, weed is.

  • @ThereminWeirdo Obviously never experimented on other drugs though i doubt.

  • @ThereminWeirdo Meth is the best drug lol.

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