1) Promote the proliferation of intestinal beneficial bacteria, inhibit pathogenic bacteria and putrefactive bacteria, greatly reduce toxic and harmful metabolites such as amines, ammonia, indole, etc., and reduce the incidence of animal diseases and diarrhea;

2) It can promote the thickening and proliferation of intestinal tissue, increase the weight, increase the height of intestinal villi, and thin the intestinal wall mucosa, so as to enhance the digestion function and better digest and absorb nutrients;

 3) it can promote the absorption of mineral elements, such as the acid substances produced by the fermentation of chitosan oligosaccharide can absorb calcium compounds to increase its solubility, thus enhancing the calcium absorption capacity;

4) in the production of nutrients, chitooligosaccharide can be broken down lactose by bifidobacteria in the gut, and various vitamins and hydrogen acids can be further synthesized by bifidobacteria.