You're ignoring the colony factor; bad microbes rarely show up in isolation, and it's the synergistic effects between them that causes the biggest side effects.

You're also ignoring external factors which alter the microbiome and cause obesity - like, for example, dishwasher rinse aids, glyphosate (which messes with shikimate pathways in akkermansia muciniphila bacteria), red 50 dye (which messes with gut permeability) and so on.

Diet isn't the only causative agent.

I think we're done talking here. Bye!

No, it's really not.

Oranges. Apples. Onions. Cranberries. Blueberries. Sauerkraut.

L-Glutamine you can buy from Amazon.

Done.

Getting closer to what? Are you sure you're replying to the right person?

Realistically, it's not macros. For prebiotics you want to focus on food sources of inulin, pectin, flavonoids and sauerkraut. Maybe l-Glutamine too.

For decades people thought eating fat gave you heart disease. Medicine doesn't generally follow an obvious or scientific path. Often it's just trial and error and see what works.

Because humans like to think they're special.

(Also, our gut microbiome is unique to humans and between different humans, and we're only just beginning to unravel precisely and exactly how much they affect us).