Trace elements are indispensable for human body, especially for children who are growing and developing, the lack of trace elements will have a great impact on their health and growth and development, and children have small stomach capacity and like to be partial and picky eaters, which are more likely to cause the lack of trace elements, so parents should pay attention to the growth and development of children to avoid the lack of trace elements in children, so what is the harm of trace element deficiency to children? What are the risks of micronutrient deficiency for children? Manganese plays a role in the synthesis and activation of enzymes in the body, and is also a necessary cofactor of chondroitin sulfate synthesis enzyme, and has a close relationship with connective tissue development, soft tissue, calcium and phosphorus metabolism. When the human body is deficient in manganese, it will lead to slow growth of cartilage, thinning of bone trabeculae, and children will not grow taller. Iodine is involved in the synthesis of thyroxine. Thyroxine can promote protein synthesis, sugar absorption and utilization, fat oxidation, and the anabolism of calcium and phosphorus in bone, as well as increase enzyme activity and regulate water and electrolyte metabolism. If a child has low thyroid function, it can cause growth retardation, slow growth of long bones, delayed ossification center, and mental retardation. Iron is an important component of hemoglobin in red blood cells and is essential for the transport and exchange of oxygen. Iron deficiency in the body causes iron deficiency anemia, and the ability of the blood to transport oxygen is lost. Therefore, children should eat foods that contain more iron, such as animal liver, intestines, kidneys and hearts, and fruits such as peaches, dates, grapes, pineapples, oranges, cinnamon, spinach, celery, tomatoes and mushrooms. Zinc is involved in the synthesis of enzymes in the body, if lack of zinc will affect the synthesis of nucleic acids and proteins, which will have a certain impact on the growth and development of children, causing power disorders, like biting fingers, slow development and other phenomena, zinc deficiency can also lead to genital stunting, mental retardation, etc. You can eat beef and lamb, lean pork and egg yolk, which contain high levels of zinc. The above-mentioned trace elements are indispensable for the human body, especially for infants and young children at the critical stage of growth and development, which can easily lead to the lack of trace elements, so parents should properly and reasonably match the diet in the usual parenting process, to avoid the lack of various trace elements that lead to slow development.