The kidney function test is about 90 yuan, kidney function is a test to evaluate the detoxification ability of the kidney, it mainly includes items such as creatinine, urea, uric acid, cystatin c, β2 microglobulin and so on, among which creatinine and urea are the most representative, which are the two most commonly observed indicators. If creatinine and urea are significantly elevated, this is a time to consider the possibility of renal failure, which is of greater clinical significance. If both of them are lower, it is usually related to poor nutrition, or less meat and fish. This test is usually 90 RMB, but of course, there are some differences due to the price level in different places. During the kidney function test, it is not necessary to fast, but it is more accurate to test on an empty stomach. In addition, the day before the kidney function test, it is best not to do strenuous exercise, such as push-ups, soccer, basketball and so on, and it is best to eat a light diet, so that the impact on kidney function is relatively smaller.