Alanine aminotransferase is glutamate aminotransferase, and because of the more convenient name of glutamate aminotransferase, liver function tests are generally shown as glutamate aminotransferase instead of using the term alanine aminotransferase. By the same token, menthyl aminotransferase is also known as glutamic aminotransferase. Glutamate aminotransferase is an enzyme involved in protein metabolism in the body, which speeds up the process of protein and amino acid conversion in the body. When the permeability of the hepatocyte membrane is altered, glutathione can spill out of the cells into the circulating blood, resulting in an elevated glutathione test value. If only 1% of the hepatocytes have these conditions, there can be more pronounced fluctuations in the GTA. The cause of the change in hepatocyte permeability can be either physiological or pathological. However, physiological causes are usually only mildly elevated and do not exceed two times the normal value, i.e., 80 U/L, while organic diseases should be considered when the value of ALT exceeds two times the normal value.