Glycyl proline dipeptidase, known as glycyl proline dipeptide aminopeptidase, is elevated and generally indicates possible liver cell damage. Glycyl proline dipeptide aminopeptidase is an enzyme primarily used to hydrolyze peptides from collagen in the blood and is found in the blood, liver, kidneys, and connective tissues. The normal serum concentration of glycylproline dipeptide aminopeptidase is 44 to 116 U/L, and above 116 U/L it is generally considered that hepatocellular injury may be present. Hepatocellular injury is common in various liver diseases, such as acute hepatitis where serum Glycyl Proline Dipeptide Aminopeptidase will be mildly elevated, liver cancer patients where Glycyl Proline Dipeptide Aminopeptidase will be elevated to more than two times the normal value, and drug-induced liver damage or cirrhosis, etc. Glycyl Proline Dipeptide Aminopeptidase is also elevated in varying degrees. Glycyl proline dipeptidase may also have other causes, it is recommended to go to the hospital in time, complete the examination to clarify the cause of the disease, and then give targeted treatment or therapy under the guidance of the doctor.