（1）Promote digestion and absorption of fats/ fat-soluble substances

　　Bile acid has hydrophilic surface and hydrophobic surface with strong surface activity, which could promote the emulsification of oil, expand the contact area between oil and lipase; regulate the activity of pancreatic lipase and trypsin, and improve its hydrolysis and metabolism on fat; transports fat in the intestines and promotes fat absorption.

　　（2）Protect liver and gallbladder, Anti-stress

　　▲ Activate FXR receptor to promote liver tissue cell proliferation and liver regeneration.；

　　▲ Promote secretion of bile, excrete heavy metals, drugs, toxins, etc, and detoxify the gallbladder；

　　▲ Maintain the balance of liver glucose metabolism and lipid metabolism, reduce fat deposition on the liver and reduce liver load.

　　▲ Enhance the activity of antioxidant enzyme, remove oxygen free radicals, and improve anti-stress ability.

　　（3）Improve immunity

　　▲ Bile acid could interact with immune cells throughout the body, regulating cytokine production and improving the body's overall immunity.

　　（4）Maintain the homeostasis of cholesterol

　　▲ The synthesis of bile acid is an important way to regulate cholesterol homeostasis.

　　▲ Inhibit cholesterol precipitation.

　　（5）Protect intestine health

　　▲ Free bile acid diffuses freely into the bacterial membrane, sterilize by causing pH changes between inside and outside of bacterial membrane.

　　▲ Promote gene mutations of pathogenic bacteria, directly damage DNA to induce death of pathogenic bacteria such as Escherichia coli and Salmonella, and inhibit their intestinal proliferation.

　　▲ Change the permeability of bacterial cell membranes, and change internal and external osmotic pressures, causing bacteria to be autolyzed.

　　▲ Promote the secreation of antimicrobial peptides by intestinal epidermal cells, increase the amount of beneficial intestinal bacteria, and maintain intestinal microecological balance.