What does an alanine aminotransferase (ALT) level of 79 U/L indicate?

Dec 03, 2025 Source: Cainiu Health
Dr. Gao Jun
Introduction
Alanine aminotransferase (ALT) is commonly referred to as serum glutamic-pyruvic transaminase. The normal reference range for ALT is generally 0 U/L to 40 U/L. A test result of 79 U/L indicates a mild elevation, which may be caused by either physiological or pathological factors. Adjusting lifestyle habits can help restore liver health, including abstaining from alcohol and avoiding spicy and greasy foods.

Alanine aminotransferase (ALT), commonly known as serum glutamic-pyruvic transaminase (SGPT), normally ranges from 0 U/L to 40 U/L. A test result of 79 U/L indicates a mild elevation, which may be caused by either physiological or pathological factors. The specific analysis is as follows:

An ALT level of 79 U/L represents a mild increase, suggesting possible minor liver damage or functional abnormality. This condition often results from increased permeability of liver cells, leading to the release of enzymes into the bloodstream. Common causes include recent heavy alcohol consumption, chronic sleep deprivation, intense physical exercise, and other lifestyle factors. It may also be associated with hepatotoxic medications, viral hepatitis, fatty liver disease, or temporary elevations due to acute conditions such as colds or fever.

Adjusting lifestyle habits can help restore liver health. Alcohol consumption should be stopped, and spicy, greasy foods should be avoided. Opt for light, easily digestible foods and consume more fresh fruits and vegetables to supplement vitamins. Maintain regular sleep patterns, avoid staying up late, and ensure sufficient daily rest to allow the liver adequate recovery time. Reduce intense physical activity; instead, choose gentle exercises such as walking or yoga. Avoid self-medicating with drugs that may harm the liver. Follow your doctor’s advice for regular follow-up tests to monitor trends in liver enzyme levels. Seek medical attention promptly if symptoms such as fatigue or jaundice occur.