The price of serum vitamin assay cannot be generalized, it varies slightly according to the city and the size of the hospital. Usually, in provincial capitals and Grade 3A hospitals, the price of serum vitamin assay varies from 178.5-198.5 yuan. In second-tier cities or second-class A hospitals and third-class B hospitals, the price is relatively inexpensive, ranging from 149-176.5 yuan for serum vitamin measurements, and in third-tier cities or third-class C hospitals, the price of serum vitamin measurements is the cheapest, usually ranging from 118.5-126.8 yuan. When measuring serum vitamins, it is necessary to get up in the morning and take blood on an empty stomach, and it is recommended that after 20:00 pm the night before, try not to eat or eat staple foods and side dishes, and the serum vitamin levels measured on an empty stomach at 8:00 am the next morning are the most standardized.