I did not mention stomach. I meant the GI-tract as a whole.

I've used food coloring and indigestibles (like corn kernels) to do experiments on whether meals can "overtake" or "merge" or "join" with other meals into poops.

that's the most insane thing i read today. kudos to your curiosity

Then you'll love https://onlinelibrary.wiley.com/doi/full/10.1111/jpc.14309

"Six paediatric health-care professionals were recruited to swallow a Lego head."

omg this article is wild lol

> To standardise bowel habit between participants, we developed a Stool Hardness and Transit (SHAT) score to look at stool consistency over time. The SHAT score is the sum of the Bristol Stool Chart scores over a specific time period divided by that time period in days.

> Post-ingestion, stools were monitored and examined in search of the excreted item. The search was conducted on an individual basis, and search technique was decided by the participant. The primary outcome was the Found and Retrieved Time (FART) score.

Adding debug prints to your diet.

Food coloring is a liquid dye. It will mix with whatever chyme it encounters in the stomach and small intestine, dyeing a large portion of the stool. It does not prove that food stayed in a single-file line.

Also, again the GI-tract as a whole is also not a "one-lane road".

Please educate yourself and do not do "experiments" on yourself. A good place to start learning more would be: https://accessmedicine.mhmedical.com/book.aspx?bookid=691 if you're intrested.