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  • More than one and a half billion people use the internet every day, and they search for

  • just about everything you can imagine.

  • Were all about that curiosity here at SciShow. Which is why weve worked with Google and

  • YouTube to answer ten of the most popular questions searched for on the internet.

  • This is The World’s Most Asked Questions.

  • Today’s question is apparently on a lot of people's minds: How much water do should

  • I drink a day?

  • Well, it’s helpful to keep in mind that you basically ARE water -- it’s your body’s

  • principal chemical component. The average adult is made up of about 65% bodily fluid.

  • And you are that way, because pretty much all of your body’s major systems depend

  • on water to function. Water regulates your body temperature and dissolves minerals and

  • nutrients, and helps carry oxygen to your cells. Your body is what scientists call an

  • aqueous solution - all the chemical reactions that happen inside of you that make you you

  • happen in water.

  • But still, exactly how much you need depends on who you are, and what youre up to.

  • Your age and weight and diet and level of activity, and even what kind of climate you

  • live in, all affect your hydration requirements.

  • If youre running marathons in August, for example, youre obviously going to need

  • a lot more water than if youre reading on the couch all day.

  • But, OK, youre looking for a number. I get that. You probably heard a lot of them,

  • so you're asking Google.

  • And the guideline youve probably heard is that you should drink eight, 8-ounce glasses,

  • or about 1.9 liters of water per day.

  • And no one’s really sure where that advice came from -- even though everyone, up to and

  • including doctors, has repeated it.

  • But according to the Institute of Medicine, the average woman should consume 2.7 liters

  • -- that’s 91 ounces -- of water a day, and men 3.7 liters, or 125 ounces a day.

  • Now, they point out that you actually get about 20% of your daily water intake from

  • the food you eat -- more than that if youre eating a lot of fruit and vegetables -- but

  • still, the so-calledeight by eightapproach might not be enough to supply the

  • other 80%

  • In the end, it’s best to use your common sense, and listen to your body. It’s a good

  • idea to keep your eye on your pee -- you want it to be a light yellow color -- but really,

  • just drink when youre thirsty, and don’t overthink it. Really, don't overthink it.

  • According to the results of our non-scientific SciShow survey, 67% of you drink three or

  • more glasses of water per day, but those of you who said you have no idea what you're

  • doing here on earth are more dehydrated than the rest of the people. So maybe just relax,

  • drink a glass of water. You'll figure it out.

  • Of all the fascinating questions in the world, what question do you want answered most? Let

  • us know on Facebook or Twitter or in the comments below and we will answer the best questions

  • in a new video at the end of the month. And don’t forget to use the hashtag #WMAQ and

  • watch the other videos this week.

More than one and a half billion people use the internet every day, and they search for


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世界で最も聞かれる質問。どのくらいの水を一日に飲むべきですか? (World’s Most Asked Questions: How Much Water Should I Drink a Day?)

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