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Objective: Leptin (LEP) is a metabolic and neuroendocrine hormone which is present in the circulation in amounts proportional to fat mass that acts to reduce food intake and increase energy expenditure thereby regulating body weight homeostasis. Various polymorphisms are shown to be present in LEP gene which play important roles in obesity and obesity-related metabolic biomarkers. The aim of this study was to investigate the association of one of these polymorphisms, leptin gene G-2548A polymorphism, on obesity in association with body mass index (BMI), lipid parameters, plasma leptin levels and homeostasis model assessment of insulin resistance (HOMA-IR).