Vitamin B1 is one of the 13 essential vitamins for the human body. It is a water-soluble vitamin and belongs to the vitamin B family. Vitamin B1 is a cofactor of the key enzyme of glucose metabolism. It plays an important role in maintaining the balance of oxidative metabolism in the brain. It is an important biologically active substance that maintains the normal functions of the nerve, heart and digestive system. Vitamin B1 protects the nervous system, promotes gastrointestinal motility, improves appetite, and has a moderate diuretic effect.