Used in biomedical research to measure levels of asymmetric dimethylarginine (ADMA) in biological samples such as plasma, serum, or tissue extracts. ADMA is an endogenous inhibitor of nitric oxide synthase, making it a key biomarker in studies related to cardiovascular diseases, endothelial dysfunction, kidney disease, and metabolic disorders. The DDAH ELISA kit enables researchers to assess DDAH enzyme activity indirectly by quantifying its substrate or product, supporting investigations into nitric oxide metabolism and vascular health. It is widely used in preclinical studies, drug development, and diagnostic research to understand disease mechanisms and evaluate therapeutic interventions targeting the ADMA-DDAH pathway.