Tehran University of Medical Sciences Acta Medica Iranica 0044-6025 29 3-4 1987 12 15 51 59 DR. M ZAHRAIE 2015 09 28 The purpose of this study was to determine a simple and sensitive test for clinical diagnosis of various hepatic diseases. Therefore y-glutamyltranspeptidase (Y** GT), aspartate aminotransferase (ASAT), alanine aminotr¬ansferase (ALAT) and alkaline phosphatase (ALP) levels were measured in 29 healthy adults and 88 sera with various liver diseases. Table I represents the results, according to which y-GT activity increases in all of studied patients, especially in alcoholic liver disease and hepatobiliary dysfunction (13, 5, 3,10, 4). The data suggest that in liver disease it is better to estimate y-GT level in serum prior to other related enzymes. https://acta.tums.ac.ir/index.php/acta/article/view/214 https://acta.tums.ac.ir/index.php/acta/article/download/214/210