1. Regulating intestinal ecological balance-preventing the invasion and colonization of pathogenic bacteria and restoring intestinal microecological balance through flora control, antagonism, competitive rejection and metabolites. 2. Inhibition of pathogenic bacteria and constipation-Probiotics are closely combined with intestinal mucosa to form microbial membranes, which are metabolized to form organic acids, effectively preventing the invasion and colonization of pathogenic bacteria and preventing constipation. 3. Nutritional function-Probiotics can synthesize various vitamins in the intestine, such as amino acids, thiamine, riboflavin, folic acid, pantothenic acid, vitamin B, vitamin K and so on. It is beneficial to the absorption of calcium, iron, copper, zinc and vitamin D, promoting growth and preventing various chronic diseases. 4. Enhance immunity and anti-aging-Probiotics can stimulate human immune system, stimulate immune cells to devour cancer-promoting substances such as indole, phenol, amine and ammonia, enhance non-specific immune function and improve disease resistance. 5. Protect the liver-Pathogenic bacteria existing in human intestines, such as Escherichia coli and Proteus, will continuously release endotoxin, which will be absorbed into the blood through veins and cause serious damage to the liver. Probiotics can inhibit the number of harmful bacteria that produce toxins and play a good role in health care and treatment of patients with liver disease. 6. Prevention and treatment of hypertension and arteriosclerosis-high cholesterol content in human blood can lead to arteriosclerosis and hypertension. Probiotics can affect cholesterol metabolism, convert it into steroids that are not absorbed by human body, and reduce the concentration of cholesterol in blood, thus having certain preventive and therapeutic effects on hypertension and arteriosclerosis. 7. Anti-tumor effect-Probiotics can eliminate carcinogenic factors such as oxygen free radicals and lipid peroxides. Experiments show that beneficial bacteria can not only inhibit the occurrence of tumors, but also inhibit the already formed tumors.