system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU / Ant-Man] So when Ant-Man is Giant Man, he doesn’t eat food because he’d have so consume it in such large quantities that when he shrinks down to his regular size, his stomach would explode. How do the Pym particles decide what constitutes a part of the body?

At what point does the meal become part of you? When it enters your mouth? When it’s in your stomach? When its converted in to energy? How does the Pym tech determine this? Is a tumor a part of you?
gpt
I don't recLl this coming up at all in the MCU. What is clear is that he has a self contained suit ckmplete with oxygen tank. His suit, and presumably the cars they drive are hermetically sealed so that they are breathing shrunken molecules.

That said, the distance between atoms and the volume of molecules is like 99.999% empty space. Which means that Pym particles don't need to affect the molecules themselves just the bonds inside them and the distances that electrons 'travel'. This could be why the quantum sizes are such a barrier, because that is the point where you running of space to remove between the atoms and force the atoms to exist, at least partially, elsewhere.