What is the normal value of transaminase?

Under normal circumstances, the reference range for transaminases may vary slightly depending on testing methods and laboratory standards, but it is generally divided into two categories: the normal range for alanine aminotransferase (ALT) is 10–40 U/L for men and 9–32 U/L for women; the normal range for aspartate aminotransferase (AST) is 15–40 U/L. A detailed analysis is as follows:

Differences in reagents, instrument precision, and calibration standards used by various laboratories can lead to slight variations in reference ranges. The normal ALT range differs between men and women—men: 10–40 U/L, women: 9–32 U/L—because men typically have greater muscle mass, which may release small amounts of transaminase into the bloodstream, resulting in a slightly higher normal range compared to women. The normal AST range is 15–40 U/L. Additionally, physiological conditions prior to testing may affect transient results, but standard reference ranges take these factors into account to ensure accuracy.

Maintaining stable transaminase levels requires attention to daily lifestyle habits. Reduce intake of high-fat and high-sugar foods, avoid alcohol consumption, and thereby lessen the metabolic burden on the liver. Maintain regular sleep patterns and avoid staying up late to allow sufficient time for liver repair. Engage in moderate exercise to improve overall health, but avoid intense physical activity that could cause muscle damage and affect test results. If undergoing transaminase testing, consume light meals and avoid strenuous activities the day before the test to ensure results accurately reflect liver condition. If abnormal values are detected, seek medical advice promptly to determine the underlying cause and avoid self-medicating with drugs unnecessarily.