@lucyvt Was your breath test a 2 or 3 gas test? If you only had a 2 gas test maybe look into the Trio Smart test by Gemelli Biotech. There is something called ISO which is hydrogen sulfide overgrowth I believe. This may explain your test results and loose stool combination. They are making progress in figuring out treatments for that. Check out the MAST program at Cedars Sinai -Dr. Mark Pimentel has been involved with research there trying to find treatments for SIBO, IMO and ISO.