Today I learned the average human body has enough iron in it to forge a metal nail that is 3-inches long, enough sulfur to kill all fleas on a dog, enough carbon to make 900 pencils, enough potassium to fire a toy cannon, enough fat to make 7 bars of soap, and enough phosphorous to make 2,200 match heads.
http://sciencenotes.org/elements-in-the-human-body-and-what-they-do/
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