Trace elements are indispensable substances in the body, and the specific price cannot be generalized and varies slightly according to the size of the city and the level of the hospital. In provincial capital cities and tertiary hospitals, the price is relatively expensive, ranging from 158.8-168.5 yuan. In second-tier cities or second-tier A-class hospitals and third-tier B-class hospitals are relatively inexpensive, with approximate prices ranging from 123.5 to 148.5 yuan. The price is cheapest in third-tier cities and third-level C hospitals, with the approximate price of trace elements ranging from 115.5-128.5 yuan. When testing trace elements, you must fast, and it is most accurate to take blood in the morning without eating.