Munchies:
It varies from person to person, but there are some things to consider.
1. High capacity does not equate to being able to process everything you eat. It's a special kind of hell to have an impressive capacity, but only being able to eat a fraction of what makes you full to avoid getting sick.
2. Once you get past a certain point, there's a very real concern that you can rupture your stomach. This is one of the worst ways to go.
3. My usual warnings about rapid weight gain.
Enas:
Yeah i get those, but im still curious, with enough time and patience how far one can go! O.o
And also, what actually might cause your stomach to rupture? (if you dont mind getting into the technical details, i would like you to)
Munchies:
Feeling full is, among other things, a safety feature. It keeps you from overeating. If you keep eating past this, you'll feel nauseous. People who have incredibly high capacities have trained themselves to eat past this point are at an elevated risk of stomach rupture for these very reasons.
Enas:
So there is a very practical limit to how much you can strech your stomach? If you do it very slowly you cant, for example, get it to actually grow as an organ? (like, the cells that compose it to multiply more so there is actually more material to expand)
Your stomach is a muscle. There is a hard limit to how much it can stretch. On average, the human stomach can hold 2 - 4 liters. As with all things, there are some outliers, but this is less about training your stomach to expand that much and more about having a naturally bigger stomach.