Used in biomedical research to measure peptide YY (PYY) levels in human biological samples such as plasma or serum. PYY is a gut hormone involved in appetite regulation and energy balance, making this kit valuable in studies related to obesity, metabolic disorders, and gastrointestinal function. Researchers use it to quantify PYY concentration in clinical and preclinical settings, supporting investigations into food intake, hormonal signaling, and therapeutic interventions targeting the gut-brain axis. The assay provides a reliable and sensitive method for detecting changes in PYY levels across different physiological or pathological conditions.