Used in biomedical research to measure levels of cholecystokinin (CCK), a peptide hormone involved in digestion and satiety regulation. The kit enables quantification of CCK in biological samples such as plasma, serum, or tissue extracts, supporting studies on gastrointestinal function, appetite control, and neuroendocrine signaling. Commonly applied in preclinical research, metabolic studies, and drug development involving gut-brain axis pathways. Provides a sensitive and specific method for detecting low concentrations of CCK peptides, aiding in the understanding of hormonal responses to nutrients and stress.