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Someone once told me it is possible to have a net weight gain of more than what you eat. For example if you eat a quarter pounder burger you can potentially gain more than 1/4 pounds. Is this true?

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Evil plan: We could feed 1kg of lion meat to tigers, and get 2kg of tiger meat to feed to lions to get 4kg of meat, and... hey we just solved world hunger! – Sklivvz Apr 30 '11 at 23:45
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You can, if you a) drink 2 liters of cola meanwhile or b) implement the opposite of nuclear fusion inside your body (see 'conservation of mass' @Purdy) E=mc². – user unknown May 1 '11 at 0:21
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@user unknown: I was assuming for the sake of argument that nuclear fusion does not, generally speaking, occur within the human gastrointestinal system. ...Yet. – Jon Purdy May 1 '11 at 0:42
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The other answers here are not considering the water that you drink. You are 65-90% water, but a cheeseburger is probably around 30% water. So, you have to count the water you drink with your cheeseburger. – Neil G May 1 '11 at 7:12
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Sort of. Everyone else has answered from the conservaton-of-mass perspective. However, a 1/4 pound cheeseburger is made from 1/4 pound of meat, ergo the 1/4 lb. does not include the bun, cheese if you like, lettuce, tomato etc... Therefore, it is theoretically possible to gain more then a 1/4 lb. from eating what is commonly referred to as a "1/4 pound hamburger", but that is simply because the assembled hamburger itself weights more then 1/4 lb. – Fake Name May 1 '11 at 8:33

protected by Jamiec Jan 15 at 10:27

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