"FODMAP is an acronym for Fermentable, Oligo-, Di-, Monosaccharides and Polyols. The language may sound complicated, but it is a diet that cuts back on a group of sugars that can be poorly absorbed by your GI tract. This includes foods containing fructose, lactose, sugar polyols (sorbitol and mannitol), fructans (found in garlic, leeks, artichokes, and wheat), and galacto-oligosaccharides (found in lentils, chickpeas, and black beans).

A low-FODMAP diet may reduce IBD symptoms, but research doesn’t support its use for reducing IBD inflammation. This diet is not typically recommended if you are in a flare, but it can be helpful if you struggle with gas and bloating. A dietitian can help you identify which of these sugars seem to worsen symptoms for you, and which food can be reintroduced without exacerbating symptoms."

References:

1. https://www.crohnscolitisfoundation.org/diet-and-nutrition/special-ibd-diets