What Causes Bean-Induced Flatulence? Before one can decide what to test, we need to know what we’re looking for. Most toot-inducing foods contain ingredients called FODMAPs (an acronym for Fermentable Oligosaccharides, Disaccharides, Monosaccharides, and Polyols—quite a mouthful). Humans cannot digest FODMAPs, but bacteria in our gut can. The byproduct of that bacterial digestion is gas. The FODMAPs that make beans the musical fruit are a small group of oligosaccharides (complex sugars). In theory, if you can reduce the amount of those oligosaccharides in your beans, you can reduce the amount of gas they produce.