Used in research settings to measure levels of Glucose-dependent Insulinotropic Polypeptide (GIP) in human serum or plasma samples. This assay helps in studying metabolic disorders such as type 2 diabetes, obesity, and insulin resistance. It supports investigation into incretin hormone function, enabling researchers to evaluate GIP secretion in response to nutrients and therapeutic interventions. Commonly applied in clinical research, pharmacological studies, and endocrine function assessments.