The harm of zinc deficiency in children has the following aspects: 1, affecting children’s growth and development, zinc is an important component of a variety of biological enzymes in the human body, in the body of tissue and organs of the metabolism plays an important role, zinc deficiency will directly lead to the slowing down of human tissue and organs of the rate of growth and development, the child will be manifested as a short, tissue damage healing difficulties; 2, reduced immunity, zinc is a necessary component of DNA polymerase The lack of zinc will make protein synthesis obstacles, immune cell proliferation is reduced, resulting in low immune function, weak, sick; 3, affect the sense of taste, zinc is involved in the composition of salivary proteins, the lack of which can lead to a dull sense of taste, loss of appetite, paranoia, anisotropy, and prone to nutritional disorders; 4, skin diseases, zinc is to protect the skin is an important element of health, lack of zinc so that rough skin, dry, slow healing of wounds, the child is often easy to Children are often prone to mouth ulcers, and long lasting; 5, zinc deficiency children hyperactivity, inattention, poor memory, learning effort; 6, long-term zinc deficiency will affect the development of sexuality, resulting in underdevelopment of the sex organs, pubertal sexual development delay; 7, affect vision, zinc deficiency affects the eye’s ability to adapt to the darkness and visual function, resulting in night vision difficulties, myopia, astigmatism, and so on.