The low FODMAP diet is a short-term elimination diet that can help people with irritable bowel syndrome (IBS) and small intestinal bacterial overgrowth (SIBO) manage their symptoms. The diet eliminates foods that are high in FODMAPs, which are short-chain carbohydrates that are poorly absorbed in the small intestine. When these carbohydrates reach the large intestine, they are fermented by bacteria, which produces gas and other byproducts that can cause bloating, abdominal pain, diarrhea, and constipation.