Background: Positioned as one of the central members in cellular antioxidant defense, glutathione reductase (GSR) determines the oxidative status of a cell. The level of its activity changes in certain physiological and pathological conditions. The rs1002149 polymorphic loci of the GSR gene, associated with the level of enzyme activity, is a potential molecular-genetic marker of complexly inherited traits (aging, multifactorial diseases). Since the glutathione system is responsible for the interaction with environmental factors, it is important to take into account the specifics of these system components actions, in particular GSR, in populations living in environments with different technogenic load. The aim of the study: The purpose of the study was the population-genetic analysis of the allelic state by the polymorphic Оригинальная статья Original article