A 24-hour urine uric acid test measures the amount of uric acid excreted in urine over a full day. It helps diagnose conditions such as gout, kidney stones, and certain metabolic disorders. Patients collect all urine produced in a 24-hour period, and the sample is analyzed to assess uric acid levels. Elevated levels may indicate excessive production or reduced excretion of uric acid, while low levels can suggest other health issues. This test is often used alongside blood tests for a comprehensive evaluation.