Prevalence and etiology of persistently elevated alanine aminotransferase levels in healthy Iranian blood donors.

Background And Aim: Causes of elevated serum alanine aminotransferase (ALT) levels vary depending on the population under study. The aim of this study was to determine the prevalence and causes of elevated ALT levels among apparently healthy Iranian blood donors in Tehran.

Methods: A total of 1959 (1465 male) randomly selected blood donors were enrolled in the study.