Science

You lose a bunch of weight every day — here's where it all goes

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If you've ever weighed yourself when you wake up in the morning and before you go to bed, then you've probably noticed that the numbers on the scale weren't the same.

Our body weight can actually fluctuate about 5.5 pounds a day.

Here's where those pounds can come from and where they can go:

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Skye Gould/Tech Insider

Most of these changes occur because of bodily functions like eating, drinking, and going to the bathroom.

On average, about 52% to 55% of women's percent body weight comes from water, while it's about 60% for the average man.

That's why men are supposed to drink 13 cups and women are supposed to drink 9 cups of beverages a day. You have to replenish the most plentiful part of your weight, after all.

If you get food poisoning and have severe vomiting and diarrhea, for example, then you could lose up to a gallon of water a day. That could drop your weight a bit lower until you get rehydrated, since 1 gallon of water weighs about 8 pounds.

But everyday weight fluctuation is totally normal, so don't worry if the scale says a slightly higher number than you think it should.

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Skye was the Design Director for Business Insider and Insider. She led the Graphics and Photo teams in producing all graphics, data visualizations, story art, photography, and special projects for the newsroom.
Rebecca was an Executive Editor for Business Insider's news division, overseeing the Science, Speed news, Weekend news, LA news, Visual Features, and Voices of Color desks. She worked across teams to assign, coordinate, and edit breaking news, explainers, features, analysis, and investigations. She also developed guides, trainings, and coaching opportunities for the newsroom to get better every day.Rebecca started as a reporter on Tech Insider's science section in 2015, covering everything from solar energy and rocket launches to Zika, before moving to the news team during the summer of 2016 at the height of the presidential election and then running weekend coverage for 2 years. She's previously worked with the Politics, Military & Defense, and Video teams, and served as an editorial liaison with the product team that powers the CMS.She received her Master's degree from the Science, Health and Environmental Reporting Program at New York University, as well as a BS in Biology and a BA in Journalism from the University of Minnesota. Rebecca has also written for Popular ScienceScientific AmericanScienceline, the Minneapolis Star Tribune, and the Minnesota Daily.ExpertiseBreaking news, legal analysis, criminal justice, police misconduct, public health, abortion, space, energy, visual features, extreme weather, White House history, voting rights, executive actionsPopular articlesJust don't call it 'climate change': What Republicans in Dallas can teach us about saving the planetWhat Buzz Aldrin was thinking when he left the moonHow the 25th Amendment works to remove a sitting presidentHurricane categories tell only part of the storyTRUMP'S FIRST 100 DAYS: Here's how they compare with Obama's, Bush's, and Clinton's