Just keep eating breads, got it.

Chyme

It's a large mass like a lumpy ball in your rectum. It's you asshole that shapes it into a log as it passes out.

They manage both groups to generate synergy and maintain production.

They have a microbial oligoculture, maybe even a monoculture.

Some people have new shit more frequently than others.

It's likely multifactorial. Transit time is going to affect microbial composition at different stages of digestion due to resource limiting and nutrient transformation effects. The digestive system also directly affects microbial composition via the immune system and modulating nutrient degradation.

I.e., two people with the identical diet and living identical lives could still have significantly different gut microbiomes.

Pretty much. I greatly reduced carbs because the were making me feel like shit. Went from daily poops to twice weekly.

No, it doesn’t reset it. And you wouldn’t want to kill off everything and start from scratch. The possible, maybe, shortcut would be a fecal transplant from someone with good gut flora.

nope, unless you are taking antibiotics, will literally cleanse the bacteria, it might change your bowel habits. when i took antibiotics a long time ago, it changed my bowel habits permanently.

yes