I. What are antibodies? Antibodies are substances produced by the body’s immune system, which are like warriors protecting our health. The immune system is a defense system of the human body, like a well-trained elite army, defending the health of the human body. The main role of the immune system is to find and destroy invaders (also known as antigens, such as bacteria, viruses, parasites and foreign objects, etc.), when the immune system found the invaders, it will make a defensive response to produce a special antigen against the immunoglobulin, known as antibodies. Do you understand the danger of antibodies? The production of antibodies to growth hormone has two harmful effects: first, it will greatly reduce the efficacy of growth hormone, the child’s rate of increase significantly lower; second, it will cause side effects, such as redness, swelling, pain and itching at the site of the injection, or hives, edema, shock and other serious conditions. Why does the use of growth hormone produce antibodies? Growth hormone is a biological product, and the production process requires very high requirements for various conditions. If the production conditions are not strictly controlled, it is particularly easy to produce impurities, so that the purity of growth hormone is affected. If growth hormone containing impurities is injected into the body, the immune system will produce antibodies against these impurities, and these antibodies will affect the activity of growth hormone. If you use growth hormone with high content of impurities for a long time, the antibodies induced by the impurities will become more and more numerous over time, thus affecting the efficacy of growth hormone. How to avoid the production of antibodies? The only way to avoid the production of antibodies is to use the highest purity growth hormone. Higher purity means fewer impurities and fewer antibodies, so that the effect of growth hormone can be maximized. Particular attention should be paid to the first year of growth hormone treatment. This is the golden period of treatment, when the child is most sensitive to the effects of growth hormone, and the effect of height increase is most obvious. Therefore, it is important to use the highest purity growth hormone during this time.