Common symptoms of zinc deficiency include: 1. Zinc deficiency may cause loss of appetite, loss of appetite, loss of taste, long-term zinc deficiency may lead to malnutrition, emaciation, pallor, etc. 2, Zinc deficiency in adolescents can also cause stunted development of secondary sex characteristics, and in some middle-aged people, zinc deficiency can also cause decreased libido and sexual function. 5. Zinc deficiency can also cause a decrease in immunity and resistance of the human body, making the human immune system work less efficiently, which can easily cause the human body to be affected by external factors, resulting in slow wound healing and wound infection.