Yes, I've found magnesium and vitamin C helpful to an extent (for SIBO-C constipation). I added two new things recently that seem to be helping: BioGaia Gastrus (L-reuteri probiotic) one of the few specficially recommended for archea-producing bacteria (methane); and SunFiber (prebiotic) which is also recommended for SIBO-C (other prebiotics are contraindicated).

Meanwhile, it was confirmed by a microbiome test and a practitioner that my microbiome is rather imbalanced at this point; most likely due to repeated rounds of antimicrobials over the years. It seems like the approach to treatment is shifting a bit as the SIBO/IMO/SIFO research progresses - in particular the work of Dr Jason Hawreluk. Whereas they used to caution against probiotics (at least in the early stages of treatment), I'm reading more and more that adding very specific strains of probiotics (depending on the type of SIBO) are key at the right stage of treatment - or even in place of antimicrobial agents.

Given your work with Pimental's associate and Lindemann, I imagine you're familiar with motility agents; Motilpro seems to work and also Iberogast intermittently Moreover, recently, my Gastroenterologist prescribed Prucalopride (Rx) which is a 5-HT 2A (specific type of serotonin) agonist that stimulates the bowel - haven't tried it yet as I'm concerned about creating a dependency.

For antimicrobials, I use Allimax Pro and Neem (Oregano Oil is very effective however, lately it's too irritating.) I tried Rifaximin with Metronidazole once as well. Both of these "kill" methods worked for a month or so but eventually, the symptoms returned as the SIBO is not gone entirely (confirmed by a breath test).

At this point, I'm in the process of finding a professional to work with to establish / maintain a program and some consistency that includes all the above; I suspect this will be most effective (rather than my own intermittent, often reactive approach).