Low serum alanine aminotransferase represents normal liver function and is generally not clinically significant and does not require treatment. The normal value of serum alanine aminotransferase, also known as glutamate aminotransferase, is 0-40 U/L. Values below 40 U/L are within the normal range and are found mainly in liver cells. Low values of serum alanine aminotransferase fluctuate and are associated with liver cell damage, the more severe the liver cell damage, the higher the value. Therefore, a low serum alanine aminotransferase is a relatively good indication. However, just because a test is low doesn’t mean it can stay low. If you drink heavily, stay up late, or take certain liver-damaging medications, your next test may have a higher value, indicating possible liver damage. Therefore, you should continue to maintain the current physical condition, pay attention to the appropriate daily supplementation of high-quality protein, such as lean meat, milk, eggs, etc., a light diet, do not stay up late, less alcohol, adjust the work and rest, and moderate exercise.