Trace elements are the basic substances that constitute human life, although its content is very small, however, they play an extremely important role in physiological functions. They control the activity of many enzymes and hormones, and participate in the whole metabolic process. According to scientific research, it is found that the catalytic activity of biocatalyst enzymes, which catalyze biochemical reactions in living organisms, is 106-1011 times higher than that of catalysts for general chemical reactions, for example, bacteria can reproduce one generation in 20 minutes under proper conditions, which is mainly due to the catalytic effect of enzymes, which shows that the catalytic effect of enzymes is very The catalytic effect of enzymes is enormous. Almost all biochemical reactions in human body are enzymatic reactions, and most of the structural components, active centers or activators of enzymes are trace elements. Therefore, trace elements are closely related to life and are essential. For example, zinc is involved in the metabolism of more than 200 enzymes. The amount of trace elements in the human body directly or indirectly affects human health and causes many diseases. The causes of zinc deficiency can be divided into three categories: decreased zinc intake, increased zinc requirement and increased zinc loss. The dietary structure of our country is based on plant foods, which are not only low in zinc, but also have too much phytate or fiber in them, which can prevent zinc from being absorbed and utilized by the body. In addition, suffering from malabsorption syndrome, long-term diarrhea, steatorrhea and other diseases can also reduce the intake of zinc. The rapid growth and development of children increases the need for zinc. Repeated infections, bleeding, hemolysis, trauma, burns, prolonged excessive sweating, and the effects of certain medications can cause an increase in zinc loss. What are the clinical manifestations of zinc deficiency? 1. Nutritional or unexplained anorexia and growth retardation. 2. Nutritional or unexplained recurrent infections and immune deficiency. 3.Heterophagia, love to eat wall dirt, cinder, lime, paper dust, hair, etc. 4.Recurrent mouth ulcers. 5.Long-term or recurrent diarrhea. 6.Unexplained sexual and sexual characteristics dysplasia. 7, ulcers, poor healing of wounds. 8.Chronic eczema. 9.Map tongue, flattened tongue papillae, atrophy and pallor. 10, hyperactivity, inattentiveness. What is the most scientific way to supplement zinc? For normal children, there are three seasons in a year, spring is the season of recovery, and there is evidence that children grow fastest in May and need to supplement various nutrients, if the supplement is not enough, it will affect the growth and development of children. It is best to give your child a zinc supplement in April and May of each year. In the hot summer, the temperature is higher and children sweat more, especially the active and naughty children who like to move and make noise, and like to participate in sports activities, which consume more physical energy and sweat more. In addition, the summer heat reduces gastric juice secretion, and children’s appetite is not good, and zinc intake is also insufficient, which aggravates zinc deficiency, and zinc deficiency causes anorexia, forming a vicious circle. To break this cycle, it is difficult to rely solely on diet, and zinc can only be supplemented additionally. The cold winter months, when the temperature is low, children’s resistance is low and the chances of respiratory infections increase. Frequent colds affect children’s learning life, play time, and growth and intellectual development. Scientific studies have proven that immune function is very closely related to trace elements. Therefore, zinc supplementation is very necessary in the cold winter months. Then again, children who show clinical symptoms of zinc deficiency should be supplemented with zinc at all times until the clinical symptoms disappear. Although trace elements are essential for life activities and have an irreplaceable role in the body, the amount needed by the human body is very small and if supplemented in large doses, they are not only difficult to absorb and utilize, but also produce side effects and toxic effects. Scientific studies have proven that if zinc is consumed 10-20 times the normal amount needed, it will have side effects on the organism. If 40-50 times the normal amount is consumed, acute poisoning can occur.