Generally speaking, the seven trace elements refer to calcium, magnesium, copper, lead, iodine, iron and zinc. However, different hospitals do not have the same specific program for trace elements. Generally speaking, trace elements refer to 18 elements such as copper, cobalt, iron, zinc, selenium, manganese, iodine, silicon, fluorine, molybdenum, etc. Calcium ions are involved in a variety of physiological reactions in the body, including blood clotting, forming an important component of bones, strengthening the contraction of the heart muscle. Among them, calcium ions are involved in a variety of physiological reactions in the human body, including blood clotting, constituting an important component of the skeleton, strengthening the contraction of the heart muscle, and maintaining the stability of the nervous system. Iron is an important raw material for the synthesis of human hemoglobin, if the lack of iron will lead to a decline in hemoglobin, resulting in microcytic anemia. Zinc is an indispensable component of human nerve development. Therefore, trace elements are vital to the human body and should be monitored regularly.