What do you mean, the human stomach is absolutely not a "one line road", your comments lacks the basic biological understanding. What you're describing is a good generic diet and maybe that's why it feels good but please learn a bit more about the stuff you are expetimenting on.
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.