My functional med doc tossed this nutraceutical name my way as a possible treatment for my SIBO. Google search turned up a few IBS/SIBO sufferers who are trying it, but no real consensus yet on effectiveness. It apparently just came out this summer. I went to their web site to see what was so special about Atrantil, and found an interesting description of how this supplement supposedly works to clean up the small intestine: While I've never been enthusiastic about being a guinea pig for new products, this one seems worthy of watching from the sidelines. That being said, I'm a bit reluctant regarding the natural ingredients being used, given my propensity for allergies and weird reactions to common substances. While I'm familiar with the first ingredient (peppermint oil) -- which did absolutely nothing for my IBS years ago -- I have no experience with the other two. Quebracho extract has the potential to contain yohimbine, which is a potent alpha blocker that was often used for erectile dysfunction before Viagra hit the market. Conker Tree extract is also known as horse chestnut, has been used for various maladies, such as varicose veins, hemorrhoids, malaria, arthritis, dysentery, and lupus. Not exactly sure how the developers determined that quebracho and conker tree extracts work as antibiotics on the methane-producing bacteria, or how they determined the most effective dose to achieve that end. But if Atrantil is as good as they claim, this could be a more cost-effective treatment for SIBO than Xifaxan. Anyone else heard of Atrantil?