>>... one of the BloSSUM species is the Akkermensia muciniphilia.
There’s evidence that Akkermansia is a source of GLP-1. Possibly a don't-care in a situation of food scarcity (the Hadza) but very much a positive in our current food superabundance. It's also super difficult to culture as it isn't just anaerobic but just a few O2 molecules can wipe out a colony.
Peter Attia recently had an interview with a molecular biologist doin work with Akker. Check his (free) podcast. No links as I'm on a mobile. Sorry for the probably numerous typos...