Used to measure glutathione peroxidase (GSH-Px) enzyme activity in canine biological samples such as serum, plasma, or tissue homogenates. This assay helps assess oxidative stress levels in dogs, which is important in veterinary research and diagnostics. It is commonly applied in studies related to aging, inflammation, toxicology, and diseases like cancer, diabetes, and neurodegenerative disorders in dogs. The kit enables quantitative analysis, supporting evaluation of antioxidant status and the effectiveness of therapeutic or nutritional interventions aimed at reducing oxidative damage in canine health.