FODMAP is an acronym that stands for Fermentable Oligo- Di- Mono-saccharides And Polyols.  These are poorly absorbed short-chain carbohydrates that are fermented in the intestines and can lead to pain, bloating and changes in gut motility, especially for those with IBS (irritable bowel syndrome).  The effects of these carbohydrate subgroups have different actions and effects in the gut.  Some may cause symptoms, where others do not. The low-FODMAP diet is a three-stage elimination diet that helps to identify which subgroups cause symptoms.  It is intended to be short-term, allowing you to determine if FODMAPs are a symptom trigger, then find out what FODMAPs are tolerated and in what quantity.  The goal is to restrict the smallest number of foods possible, while still controlling symptoms.