Used in clinical and research laboratories to quantitatively measure copeptin levels in human serum or plasma samples. Copeptin is a stable biomarker associated with the arginine vasopressin system and is used to aid in the diagnosis and prognosis of various conditions including cardiovascular diseases, sepsis, diabetes insipidus, and stress-related disorders. The kit supports immunoassay-based detection, enabling high-throughput analysis with reliable sensitivity and specificity. It is commonly applied in studies related to fluid balance, shock assessment, and risk stratification in acute care settings.