Glutathione Peroxidase (GSH-Px) Activity Assay Kit is widely used in biomedical research to measure the activity of the enzyme glutathione peroxidase in biological samples. This enzyme plays a critical role in protecting cells from oxidative damage by reducing hydrogen peroxide and lipid peroxides to water and corresponding alcohols, using glutathione as a substrate. The assay kit is essential for studies focused on understanding oxidative stress mechanisms, which are implicated in various diseases such as cancer, neurodegenerative disorders, and cardiovascular conditions. Researchers utilize this kit to evaluate the antioxidant capacity of cells and tissues, assess the impact of oxidative stress in experimental models, and screen potential therapeutic compounds that modulate oxidative stress pathways. Additionally, it is applied in clinical diagnostics to monitor oxidative stress levels in patients and evaluate the effectiveness of antioxidant therapies. The kit provides a reliable and sensitive method for quantifying GSH-Px activity, making it a valuable tool in both basic and applied research.