No idea. Just kept trying shit from random reddits. One recommended something with a certain strain. The digestive advantage 4 in 1 seemed to help for a while. It has BC30, GBI30, 6086. I can't remember which was less common in probiotics but one of those apparently was the one that would help me.
I didn't even think that these things had "different strains" - I thought they were just random junk mail spam they'd throw in your gut but I guess some are concentrated with different bacteria that can help me. Honestly I should get back on it because I've been suffering greatly lately.
Interesting. I can never gain proper mass and lately i feel like i might have IBS too...