The Cortisol Spot Urine test is a fast, convenient screening tool. It measures the amount of cortisol in a single urine sample, usually collected in the morning. This test is often used to calculate a cortisol-to-creatinine ratio, which provides a rapid, non-invasive snapshot of your body's cortisol levels. While a 24-hour test is more comprehensive, this 'spot' test is an excellent, simple first step to investigate adrenal function and guide further testing. This is a simple, proactive, and convenient way to get an initial look at your adrenal health, providing the clear data your doctor needs to guide your next steps.