@surfnscientist I've been watching your youtube video, where you calculated the amount of CO2 and H2O you get rid of when burning 10kg of fat. I think it's wrong. If you add it up, you get 10 kg!
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Replying to @ArpadLLukacs
Hi Árpád, your stoichiometry is👍but my calculation answers this question: When you burn 10kg of fat, how much of that 10kg becomes CO₂ and how much becomes H₂O? I'm separating the products into 1) the atoms that came from the fat and 2) the atoms that came from O₂

Apr 2, 2021 · 1:16 AM UTC

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Replying to @surfnscientist
That is still not so simple. The carbon in the fat can only become carbon in the CO2, the hydrogen in it can only remain hydrogen (in the H2O), and of course, the oxygen remains oxygen too. So the ratio of CO2 and H2O you quote is right, but not the masses.
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I agree, it is not simple. In fact, I made a mistake in my original @bmj_latest manuscript, as you'll see in the published errata. Try using a spreadsheet instead of a calculator so you can trace your errors through: bmj.com/content/349/bmj.g725…

When somebody loses weight, where does the fat go?

Ruben Meerman and Andrew Brown explain why the answer might not be what you expect

bmj.com
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