This assay kit is widely used to measure glutathione peroxidase (GSH-Px) activity in various biological samples, such as tissues, cells, and serum. It plays a crucial role in evaluating oxidative stress levels by quantifying the enzyme's ability to reduce hydrogen peroxide and lipid hydroperoxides, protecting cells from oxidative damage. Researchers utilize this kit in studies related to aging, neurodegenerative diseases, and cancer, where oxidative stress is a key factor. It is also employed in assessing the efficacy of antioxidants and therapeutic interventions aimed at mitigating oxidative damage. The kit is valuable in both clinical diagnostics and biomedical research for understanding cellular defense mechanisms against reactive oxygen species.