Dear 100 Hour Board,
We have read that you really do intake calories by breathing the air. Is that true? If so, would you get more calories from breathing the air in a kitchen where cookies were just baked, than a room where someone was peeling an orange?
Kristen and Zach
[Laughs so hard he has so many tears running down his face that he can't see the screen clearly].
No. You don't intake calories by breathing air. Calories come from the breakdown and conversion to energy of three things: carbohydrates, fats, and proteins. Even though all of these three are floating around in the air, there's no way for them to diffuse into the bloodstream through the lungs, and the amount that would get into your digestive system by swallowing air is infinitesimal. It might, if you're lucky, amount to one or two calories over your entire life. You burn more calories than this just by inhaling deeply.