Question
“What is the normal value for alanine aminotransferase (ALT) if a five-month-old baby’s liver function test results show elevated levels of alanine aminotransferase and aspartate aminotransferase?”
Answer
“The normal range for alanine aminotransferase (ALT) is 0-40 u/L. Liver transaminases include alanine aminotransferase and aspartate aminotransferase, with the former primarily distributed in liver cells and the latter in the heart and other tissues and organs. Even if only 1% of liver cells are damaged, it can lead to a doubling of enzyme activity in the serum. Elevated alanine aminotransferase levels may be associated with acute hepatitis, the use of drugs that harm the liver, excessive alcohol consumption, certain bile duct diseases, heart failure, and other factors. Simply abnormal liver function does not necessarily mean hepatitis; a definitive diagnosis of hepatitis requires a combination of clinical symptoms, signs, and pathological diagnosis.”