Used in biomedical research to measure levels of cholecystokinin (CCK) in biological samples such as plasma, serum, or tissue extracts. It is particularly applied in studies related to gastrointestinal function, appetite regulation, and pancreatic secretion. The kit enables researchers to quantify CCK concentration with high sensitivity and specificity, supporting investigations into digestive disorders, neuroendocrine signaling, and satiety mechanisms. Commonly used in preclinical studies involving bovine models or comparative physiology.