A uric acid test is a medical diagnostic tool that measures the amount of uric acid in the blood. Uric acid is a waste product that is formed during the breakdown of purines, which are substances found in many foods and drinks, particularly those high in protein. Elevated levels of uric acid in the blood can lead to conditions such as gout, kidney stones, and kidney disease. The test is usually performed on a blood sample taken from a vein in the arm, and the results can help doctors diagnose and monitor these conditions. Treatment for high uric acid levels may involve changes in diet and lifestyle, medication, or both.