I can't find any clear data on that. I wouldn't be too worried about it though. If it has a negative effect it is likely nothing compared to taking abx. Some even claim it has prebiotic effects.
Thanks for looking!
I don't even know if I've got h pylori at this point - just guessing from what Chris Kresser says - but by the time I get a gastro consult it could be months (if I'm even going to be given an NHS referral). And even then, I don't know what approach an NHS gastro would take - the first thing my GP wanted was for me to go onto a month of PPIs.
Feeling very much on my own with this very frightening situation (frightening because of the prospect of losing my PS-based improvement).
Wondering how long this problem will take to fix - some people talk about it taking years on a low-carb diet to fix SIBO/GERD (again, if that's what I've got).