The role of zinc includes improving immunity, maintaining the balance of taste, ensuring that the nutritional flora of the gastrointestinal tract is in a normal state, maintaining vision, and maintaining the metabolic function of the liver, zinc is a trace substance in the human body. For internal organs, trace elements are important for the liver to maintain the normal metabolic function of the liver, to maintain the normal growth and development of various immune factors produced from the liver, to maintain the immunity of the body, the function of the immune system has an important role to play, to improve resistance, to restore the body to health after illness, to protect the eyes, and to maintain the normal function of the sense of taste. Trace elements are important for maintaining normal metabolism and absorption in the gastrointestinal tract, and can play a balancing role in various intestinal flora to avoid acute inflammation of the gastrointestinal tract.