Trace elements play an extremely important role in the human body, and their deficiency or excess is closely related to our health. For example, trace elements, it has a special affinity with the hair, the body’s trace elements boarding in the hair, its content is high or low, are predictive of the occurrence of certain diseases. A deficiency of copper, for example, will cause the hair to turn gray. Deficiency of zinc, it will inhibit the growth rate, especially children, if children lack of zinc, it will affect the development of children or height and other conditions. There is also a lack of calcium, easy to lose hair, very often old hair loss, may be trace elements of calcium deficiency, you can check. Nowadays, many maternal and child health centers or children’s hospitals or general hospitals have routine checks for trace elements. For example, lead, copper, zinc, calcium, magnesium, iron, and so on, as a routine check, because these tests, in order to know the emergence of certain diseases, in order to treat the symptoms.