I had other symptoms too not just fatigue. So then Googling around, finding a lot of bad info or info that's obviously hocus pocus etc and slowly filtering down to "gut bacteria play a role in this, interesting". So then you gotta sift through the probiotics BS industry stuff and tried different "down to earth - not hocus pocusy" brands/strains. Really hard to find good info though if you don't really look for it.

You can see it in other posts from me. I think the histamine intolerance part was fixed by the Bacillus subtilis that's in what I take. Though some of the regular lacto bacillus strains certainly helped crowd out whatever was in me before. But some lactk Bacillus actually create histamine. For exame I could not drink Actimel.i can attest to the fact that it has live bacteria that make it to the gut alive because actimel gives me headaches (literal headaches not figure of speach)