Serum zinc

Zinc is one of the main trace elements in the human body and is involved in the formation of many coenzymes. It plays an important role in growth, intellectual development, and maintenance of the body's immune function. There are physiological changes in serum zinc content of normal people: ① Poor sex: women are lower than men; ② Age: children are lower, but the range of change is large; ③ Day difference: highest at 8 noon, lowest at 3-9 noon; ④ Diet: eating Reduced by about 20% after 3h.