2. By regulating the immune function of the host mucosa and system or by regulating the balance of intestinal flora, the absorption of nutrients can be promoted, and the intestinal health can be maintained, thus producing a single microorganism or mixed microorganism with clear composition beneficial to health.
3. Promote the digestion and absorption of nutrients. Probiotics can synthesize digestive enzymes. Together with digestive enzymes synthesized by animals, it participates in the digestion of nutrients in the intestine, stimulates the secretion of digestive enzymes in animals, reduces the depth of crypts in the small intestine, increases the height of villi, increases the surface area of the small intestine, and promotes the absorption of nutrients in the intestine.
4. Improve the body's immunity. The structure of probiotics, such as peptidoglycan, lipoteichoic acid, etc., can be used as antigens to directly activate immunity, or stimulate the host's immune system through autocrine immune activators, thus improving the immunity of animals, enhancing the activity of innate immune cells and natural killer cells, activating dendritic cells, stimulating the body to produce cytokines, and stimulating B cells to secrete antibodies. Probiotics can stimulate the intestinal tract to produce secretory globulin A(SIgA) and protect health.