Used to measure glycerol-3-phosphate dehydrogenase (GPDH) enzyme activity in human biological samples such as serum, plasma, or tissue extracts. This assay is commonly applied in metabolic and clinical research to study disorders related to lipid metabolism, insulin resistance, and obesity. It helps assess the functional status of GPDH, which plays a key role in the glycerol phosphate shuttle and triglyceride synthesis. The kit enables high-throughput, quantitative analysis in research settings investigating diabetes, metabolic syndrome, and adipocyte function.