Liver and kidney function tests require blood to be drawn from a vein and analyzed in a hospital laboratory to obtain the results, usually using fasting blood in the early morning for more accurate testing. Liver function tests include aminotransferase, glutamyltransferase, serum protein, bilirubin, etc. The results are obtained by drawing blood from a vein and analyzing the results to determine the state of liver function and diagnose diseases. The results can be analyzed to determine the state of liver function and diagnose diseases. The results may be affected after eating and drinking, and fasting blood is usually taken early in the morning for the test, and fasting is usually required to be fasted for about 8 hours. Kidney function test items include blood creatinine, blood urea nitrogen, blood uric acid, cystatin C, etc., also through the extraction of venous blood, laboratory tests, and according to the results of blood creatinine and other estimated glomerular filtration rate, which can be reflected to a certain extent in the metabolism of the kidneys and the damage to analyze and diagnose related diseases. Liver and kidney function tests are simple and quick, and are routine tests. It is recommended to complete the relevant tests under the guidance of a professional doctor.