Isomalto-oligosaccharides, also known as prebiotics, have positive and important effects on the human digestive system, immune system, and metabolic and circulatory systems. Isomalto-oligosaccharides are a beneficial flora in the human digestive tract and play a facilitating role in maintaining the breakdown, conversion and absorption of food in the digestive system. In the digestive tract, isomalto-oligosaccharides can act as water-soluble fiber. Under the influence of this substance, the peristaltic function of the stomach, intestines and other digestive organs is enhanced, thus preventing constipation, bloating and other adverse symptoms in patients. According to relevant studies, isomalto-oligosaccharides have an elevating effect on the absorption of vitamins and the strengthening of the immune system. The intake of isomalto-oligosaccharides can effectively reduce the concentration of serum lipids and cholesterol in the body, reducing the probability of circulatory metabolic diseases.