Low glutamic aminotransferase may be the result of low dietary intake of protein or excessive consumption of catabolism, and has no specific clinical significance or apparent harm. Glutamine aminotransferase is mainly distributed in the mitochondria of cardiomyocytes and hepatocytes, and can also be found in muscles such as cardiac muscle and skeletal muscle. Normally, it is found in low levels in the blood, with a normal reference value of 0-40 U/L. Low values of this enzyme may be caused by low protein content in the recent diet or excessive protein consumption due to disease states. In clinical work, the low value of this index has no obvious clinical significance and is not obviously harmful to the human body, so there is no need to be too nervous. It is recommended that if you experience any discomfort, please consult a doctor for standardized diagnosis and treatment in a timely manner.