Not the person you're replying to, but my own IBD went away completely after I did keto for an extended period. This was a decade ago and it hasn't come back even as my diet returned to normal.
In my n=1 experience, it seems maybe significant dietary changes can perturb the gut ecosystem out of whatever state corresponds to IBD.
I had a similar experience, i.e. strict keto for 9 months and fully came off meds with no signs of UC or asthma. UC came back after around 2 years and I don't remember how long before I had to start asthma meds again. I can no longer do keto though, each time I try I get palpitations now after around a week.
Yeah my asthma went into remission as well, though this was also a period of my life when I was very physically active and in the best shape of my life, so it's hard to say what was the cause there.
They sometimes can, but most properly gut-adapted microbes only have their relative prevalence reduced by diet changes, by and large people unfortunately tend to snap back once diet is discontinued.
Ideally, you'd combine that with doing a stool transplant first, since it's the main thing (other than just antibiotics) that causes permanent compositional changes.
I'm not a scientist on any level, so my theory only went as far as "stop irritating the thing and let it heal itself."
When they started talking about putting me on immune-suppressant drugs during a pandemic, I thought that didn't sound like a very good idea, but maybe my body could sort itself out if I gave it the opportunity.
Not a terribly sophisticated take, but it works for things like not popping blisters or picking at scabs, so it seemed worth a shot.
Would that select for a particular biota / micro-fauna environment ? or cause less mechanical / chemical inflammation ?
glad it worked in your case.