Glutaminase 73 U/L is above normal, but not serious, and can be elevated by excessive alcohol consumption, liver disease, heart disease, and biliary tract disease. Glutaminase is found in normal cells, with hepatocytes having the highest levels. The entire liver contains about 100 times the amount of glutaminase found in the blood, so anytime there is destruction of hepatocytes, it can cause a large amount of glutaminase to be released. The normal range for ALT is between 5.0 and 49.0 U/L. There are a number of common causes that can cause short-term increases in ALT, such as heavy alcohol consumption and the use of certain hepatotoxic drugs. The elevation usually stops when the cause is removed and does not require much treatment. In addition, elevated ALT is also seen in viral hepatitis, cirrhosis, hepatocellular carcinoma, biliary tract disease, myocarditis, heart failure, etc. It can be seen that although the highest level of ALT is found in the liver, diseases in other organs can also cause it to be elevated. After checking out the elevated alanine aminotransferase, it is important to inform your doctor in time, who will make a judgment in conjunction with other tests.