Isomaltooligosaccharides, also known as prebiotics, have a positive and important effect on the human digestive system, immune system, metabolic circulatory system and so on. Isomaltooligosaccharides are a kind of beneficial bacteria in the human digestive tract, which play a role in promoting the function of maintaining the decomposition, transformation and absorption of food in the digestive system. In the digestive tract, isomaltooligosaccharides act as water-soluble fiber. Under the influence of this substance, the peristaltic function of the stomach, intestines and other digestive organs and tissues will be enhanced, thus preventing constipation, bloating and other adverse symptoms. According to relevant studies, isomalt oligosaccharides have a boosting effect on the absorption of vitamins and the enhancement of the immune system. After the human body ingests isomalt oligosaccharides, it can effectively reduce the concentration of serum lipids and cholesterol and other substances in the body, and reduce the probability of circulatory metabolic diseases.