Isomaltooligosaccharide (IMO) is a soluble fiber made from starch, usually tapioca or rice. It tastes mildly sweet. Manufacturers often use it as a prebiotic or a low-calorie sweetener in foods and supplements.
The fiber feeds beneficial bacteria in the gut, which supports digestive health and regular bowel movements. Some people choose IMO as a lower-glycemic swap for sugar. Blood sugar responses vary because certain processed forms are partially digested in the small intestine while unprocessed IMO resists digestion.
Take IMO with meals. Mix the powder or syrup into food or drinks. Gas, bloating, and stomach discomfort are common side effects, especially at high doses. People with IBS or FODMAP sensitivities may react, so they often avoid it. Talk to a health professional before use.