I think that, theoretically, if someone’s flatus contained an abnormally high amount of lighter-than-air gases, like hydrogen and methane, they might get very slightly heavier. Having a gas like that inside of you would, I think, provide a bit of a buoyant force lifting you away from the scale that would make your weight read lower, and releasing that gas would sort of drop your full weight onto the scale.
In practice, methane and hydrogen are only part of a fart, and other gases and such in the mix are heavier than air, so at best you might break even.
Probably a few caveats to that about temperature and pressure and such, and it’s doubtful that anyone’s gut produces enough of the right kinds of gas for that to happen.
I think that, theoretically, if someone’s flatus contained an abnormally high amount of lighter-than-air gases, like hydrogen and methane, they might get very slightly heavier. Having a gas like that inside of you would, I think, provide a bit of a buoyant force lifting you away from the scale that would make your weight read lower, and releasing that gas would sort of drop your full weight onto the scale.
In practice, methane and hydrogen are only part of a fart, and other gases and such in the mix are heavier than air, so at best you might break even.
Probably a few caveats to that about temperature and pressure and such, and it’s doubtful that anyone’s gut produces enough of the right kinds of gas for that to happen.
That would assume the digestive system isn’t under pressure, but I think it is slightly?