Used for the quantitative determination of Glutathione Peroxidase (GSH-Px) enzyme activity in duck tissue samples such as liver, blood, or plasma. This ELISA kit enables researchers to assess antioxidant capacity and oxidative stress levels in poultry, which is critical in studies related to animal health, nutrition, and disease resistance. It is commonly applied in veterinary research, agricultural science, and pharmaceutical development to evaluate the impact of feed additives, environmental stressors, or infections on the duck’s antioxidant defense system. The assay provides high sensitivity and specificity, allowing accurate measurement of GSH-Px levels in experimental and diagnostic settings.