Because of its high solubility and bioactivity, Chitosan Oligosaccharides can be used as food materials or food additives. 
Chitosan Oligosaccharides have the function of intestinal immune regulation, detoxification, lowering blood lipids and glucose , anticoagulation, anti-inflammation and Immune system regulation, and can be used as food of patients with obesity, diabetes, colorectal cancer, and habitual constipation. Chitosan Oligosaccharides can also be added to the spices, dairy products, and fruit juice, which can both enrich the taste of products, and improve the nutrition. Chitosan Oligosaccharides can be applied in fruit and vegetable preservation because they keep the fruit and vegetable fresh.