Used in biomedical research to measure ghrelin levels in biological samples such as serum, plasma, or tissue extracts. Enables scientists to study the role of ghrelin in appetite regulation, energy balance, and metabolic disorders like obesity and diabetes. Commonly applied in endocrinology, neuroscience, and pharmacology studies to evaluate hormonal responses to food intake, fasting, or drug treatments. Supports high-throughput screening in clinical and preclinical research settings due to its sensitivity and reproducibility.