Used for the quantitative measurement of cortisol levels in biological samples such as serum, plasma, or saliva. Widely applied in research settings to study stress response, adrenal function, and hypothalamic-pituitary-adrenal (HPA) axis activity. Supports investigations in endocrinology, neuroscience, psychology, and pharmacology, particularly in studies related to chronic stress, sleep disorders, depression, and metabolic syndromes. Provides high sensitivity and specificity for accurate detection of cortisol concentrations, enabling reliable data collection in both human and animal studies.