Nice experiment and data, happy to read this. The general idea is right, but some of the technical explanations are wrong.<p>&gt; <i>The fat from our food gets stored in our bodies as a compound called triglyceride. What’s triglyceride, you ask?</i><p>Actually, most of what we call fat are just triglycerides, there are many kind of it, it&#x27;s a family of molecules:<a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Triglyceride" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Triglyceride</a> . (And some of the food is stored in other forms, like glycogen: <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Glycogen" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Glycogen</a> )<p>&gt; <i>Indeed, more googling suggests we release somewhere around 20 mg of water and 36 mg of carbon dioxide per exhalation. [...] we breathe out about a pound of the stuff formerly known as dinner (and lunch, and breakfast, and snacks) while we sleep!</i><p>Actually, part of that mass comes from the oxygen in the air, that is used to burn the food, so that part has to be discounted. (I guess it&#x27;s something like 75% of the mass from the food and 25% of the mass from the oxygen of the air, but I have to make the calculations carefully to be sure.)