Isomaltooligosaccharide

What is Isomaltooligosaccharide?

Isomaltooligosaccharide (IMO) is a prebiotic fibre made up of short-chain carbohydrates that are partially digestible and commonly used as a low-calorie sweetener and fibre supplement. It is derived from starch sources such as corn, wheat, or tapioca through enzymatic processing. Due to its mild sweetness and functional benefits, IMO is often included in protein bars, functional foods, and dietary supplements as a source of fibre and a sugar alternative.

How Isomaltooligosaccharide Works in the Body

IMO is classified as a prebiotic, meaning it provides food for beneficial gut bacteria in the digestive tract. While some of it is digested in the small intestine, a portion ferments in the colon, producing short-chain fatty acids (SCFAs) that support gut health and microbiome balance. It has been used in sports nutrition and weight management products due to its low glycaemic impact compared to traditional sugars. However, its digestibility varies, and some individuals may experience mild digestive discomfort if consumed in large amounts.

Where is Isomaltooligosaccharide Found?

IMO is naturally found in small amounts in honey, fermented foods, and some grains, but most commercially available IMO is produced through enzymatic modification of starch. It is widely used in protein bars, meal replacements, and sugar-free foods, often marketed as a fibre-rich, low-glycaemic sweetener. It is available in powder, syrup, and supplement form, sometimes combined with other prebiotic fibres such as inulin or fructooligosaccharides (FOS).

Potential Effects of Supplementation

Many individuals consume IMO for digestive health, sugar reduction, and fibre intake. It is often chosen as a natural alternative to artificial sweeteners and is included in sports and fitness supplements for its low impact on blood sugar levels. Some people incorporate IMO into their dietary routine for gut microbiome support, while others use it as a functional carbohydrate in high-protein foods. However, individual tolerance may vary, and excessive consumption can lead to bloating or gastrointestinal discomfort.

Final Thoughts

Isomaltooligosaccharide is a prebiotic fibre and functional sweetener that supports gut health and low-glycaemic nutrition. Its ability to act as a mild sweetener while promoting digestive balance makes it a popular ingredient in functional foods and health supplements. As with any dietary fibre, individual responses may vary, and those considering its use should assess how it fits within their dietary and digestive health goals. Whether used in low-sugar foods, sports nutrition products, or as a fibre supplement, IMO remains a widely used and recognised functional carbohydrate.