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Here’s a question that a lot of people have asked the internet, presumably after a party,
or during a lull in a wedding reception, or maybe around last call at the local tavern
if their fingers, they can get them to work on the phone…
Why does beer make you pee? Well, you know how alcohol tends to make simple things suddenly
really complicated? Well, that applies here, too. You might think that the answer is obvious:
beer goes in, pee comes out. Beer is mostly water, so why wouldn’t it make you pee?
But, it’s a little more complicated than that, and it has to do not just with beer,
but any drink that has the active ingredient ethanol, also known as ethyl alcohol.
You probably know that alcohol messes with all sorts of brain functions—just first-hand,
probably. It does this by making it harder for your neurons to communicate with each
other, but it also affects your endocrine system, that network of glands that secretes
the hormones your body needs to keep your heart beating and your cells metabolizing
and your sexy parts working.
In this case, alcohol interferes with a specific hormone secreted from your pituitary gland
called vasopressin, sometimes called anti-diuretic hormone. Its job is to help your body retain
water. It sends signals to your kidneys to keep your body hydrated by maintaining just
the right balance of water and mineral salts in your blood.
But while the alcohol’s messing with your brain, it’s also messing with your pituitary,
and actually turns off the production of vasopressin. Without those orders being sent to your kidneys
to retain a certain amount of water, they just start letting all the water in your system
through, sending it straight to your bladder.
So the more alcohol you ingest, the less vasopressin you produce, the more water you lose. That
is why after a couple of drinks you’ll notice that your urine becomes lighter in color,
and if you’ve had way too much, eventually comes out clear. At that point, you’re essentially
peeing out nothing but water. When you see that, you know that you’ve not only had
too much, but you’re in for a hurtin’ the next day, because dehydration is what
causes hangovers.
So thanks for asking! I hope that you learned something useful, and thanks especially to
all of our Subbable subscribers who make this and everything you see here on SciShow possible.
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Why Does Beer Make You Pee?

1307 Folder Collection
Eating published on February 24, 2015
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