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Speaker 1: com m z y dot com. Welcome to brain Stuff

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Speaker 1: from how Stuff works dot com where smart happens. Hi

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Speaker 1: Am Marshall Brain with today's question. What causes me to

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Speaker 1: gain two or three pounds during the day and then

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Speaker 1: lose two or three pounds while I sleep at night.

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Speaker 1: The main thing that's changing overnight is the amount of

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Speaker 1: water in your system. It's amazing how much water ways.

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Speaker 1: A gallon of water weighs eight pounds, and a pint

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Speaker 1: of water or half a leader weighs one pound. This

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Speaker 1: means that if you drink a half liter bottle of water,

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Speaker 1: you instantly gain one pound from the water. That's a

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Speaker 1: big weight change, and it can happen very quickly overnight.

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Speaker 1: There are two processes that cause you to lose water gradually.

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Speaker 1: The first is respiration. Each time you exhale, you lose

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Speaker 1: a little bit of water. Exhale onto a cool piece

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Speaker 1: of glass and you can see this moisture. The second

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Speaker 1: is transpiration through the skin also known as sweating over

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Speaker 1: the course of a night. Both of these processes eliminate

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Speaker 1: quite a bit of water. Then there's the tradition of

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Speaker 1: using the restroom prior to the morning way in that

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Speaker 1: process can eliminate up to a pound of water. The

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Speaker 1: average person eliminates about one point two liters of water

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Speaker 1: in urine each day, and also eliminates about one liter

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Speaker 1: a day through respiration and transporation. That's almost five pounds

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Speaker 1: of weight fluctuation happening throughout the day. You may have

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Speaker 1: heard that it's important to drink about eight glasses of

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Speaker 1: water every day. Respiration, transpiration, and urination are the reasons why.

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Speaker 1: For more on this and thousands of other top six

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Speaker 1: visit how stuff works dot com. All clouds are not

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