Inulin is a soluble dietary fibre. It is a naturally occurring oligosaccharide (several simple sugars linked together) belonging to a group of carbohydrates known as fructans. Unlike most carbohydrates, inulin is non-digestible. This allows it to pass through the small intestine and ferment in the large intestine. Through the fermentation process, the inulin becomes healthy intestinal micro flora (bifidobacterium).