Birdie121 t1_je66xd6 wrote
Reply to comment by Water-Cookies in ELI5: How does your stomach "know" when to pass food on if more food keeps entering during initial digestion? by Water-Cookies
Not always. Insoluble fiber won’t break down, and it’s common for whole seeds and fruit skins and other tougher materials to remain whole all the way to your poop.
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