Zinc supplementation for children is generally better about an hour after dinner, as the digestion of food facilitates the absorption of zinc, and the absorption and utilization of zinc will be higher after entering the sleep state. Zinc plays an important role in the growth and development of children, promoting intellectual development, improving immunity and increasing appetite. A lack of zinc in children can directly cause low immunity, affect growth and development, lead to mental retardation and short stature, and even cause dwarfism. Zinc deficiency in children often manifests itself as anorexia, paranoia or omnivory, yellowing of hair, short stature and backward intellectual development. At the same time, immunity decreases and colds, fevers and mouth ulcers often appear. Secondly, it should be noted that zinc and calcium supplementation for children are not recommended to be carried out at the same time to prevent calcium from affecting zinc absorption. It is necessary to pay attention to the coarse and fine food, avoid partial eating, picky eating or long-term consumption of refined food, you can eat more zinc-rich food, such as oysters, squid, nori, red meat, animal liver, etc.