Is a serum glutamic-pyruvic transaminase (SGPT) level of 9 U/L normal?

Under normal circumstances, the reference range for alanine aminotransferase (ALT) is 0–40 U/L. An ALT level of 9 U/L falls within the normal range. If any discomfort occurs, it is recommended to seek medical attention promptly. Detailed analysis is as follows:

ALT is primarily found within liver cells. Under normal conditions, its concentration in the blood is very low. The clinically accepted normal range is 0–40 U/L, and a value of 9 U/L lies well within this range, indicating intact liver cell structure without significant damage. This enzyme is a sensitive indicator of liver health; when liver cells are damaged or ruptured, ALT is released in large amounts into the bloodstream, causing elevated levels. A value of 9 U/L suggests no such abnormality has occurred, reflecting stable liver metabolic function and no need for excessive concern.

To maintain liver health, attention should be paid to daily lifestyle habits. Reduce intake of high-fat and high-sugar foods, and increase consumption of high-quality proteins, fresh vegetables, and fruits to reduce the metabolic burden on the liver. Strictly avoid alcohol to prevent direct damage to liver cells. Maintain regular sleep patterns, avoid staying up late, and ensure the liver has sufficient time to repair itself at night. Engage in mild physical activities such as walking or tai chi to enhance overall bodily function. Regular liver function tests are recommended to monitor liver health dynamically, and if symptoms such as decreased appetite or fatigue occur, prompt medical evaluation is advised.