Use

This test measures cortisol levels at three different collection times to evaluate adrenal gland function and assess circadian rhythm patterns. Cortisol is a key hormone involved in stress response, and abnormal levels may indicate adrenal insufficiency (e.g., Addison’s disease), cortisol excess (e.g., Cushing’s syndrome), or disruption of daily hormonal balance. Results across three specimens help characterize diurnal variation and more accurately diagnose endocrine disorders.