The human body is composed of more than 80 elements. According to the different contents of elements in human body, it can be divided into macro elements and trace elements. All elements, such as carbon, hydrogen, oxygen, nitrogen, calcium, phosphorus, magnesium, sodium, etc. , accounting for more than one tenth of the total weight of the human body, is called a macro element; Elements that account for less than one tenth of the total weight of human body, such as iron, zinc, copper, manganese, chromium, selenium, molybdenum, cobalt and fluorine, are called trace elements (iron is also called semi-trace elements). The content of trace elements in human body is really negligible. For example, zinc only accounts for 33 parts per million of the total weight of human body. Iron is only 60 parts per million. Although the content of trace elements in human body is not much, it is closely related to human survival and health and plays a vital role in human life. Excessive intake, insufficient intake, imbalance or lack of them will cause different degrees of physiological abnormalities or diseases. The most prominent role of trace elements is closely related to vitality, and only the amount as large or smaller as matchhead can play a huge physiological role. It is worth noting that these trace elements must usually be obtained directly or indirectly from the soil, but most people often cannot get enough trace elements through diet. According to scientific research, up to now, it has been confirmed that there are 18 kinds of essential trace elements related to human health and life, namely iron, copper, zinc, cobalt, manganese, chromium, selenium, iodine, nickel, fluorine, molybdenum, vanadium, tin, silicon, strontium, boron, rubidium and arsenic. Each of these trace elements has its own special trace elements.
Special physiological function. Although they are very rare in the human body, they are necessary to maintain some decisive metabolism in the human body. Once these essential trace elements are lacking, the human body will suffer from diseases and even life-threatening. At present, it is clear that about 30% of diseases are directly caused by the lack or imbalance of trace elements. Zinc deficiency can cause swelling, papules and eczema in the mouth, eyes, anus or vulva. For another example, iron is one of the main components of hemoglobin, and iron deficiency can cause iron deficiency anemia. It has been reported abroad that the reduction of the total amount of iron, copper and zinc in the body can weaken the immune mechanism (disease resistance), reduce the disease resistance, promote bacterial infection, and the mortality rate after infection is also high. Trace elements also play a very important role in disease resistance, cancer prevention and longevity.