Serum or plasma concentration of uric acid (substance concentration)

Why This Test Might Be Ordered

Your healthcare provider may order this test to check for high uric acid levels, which can lead to gout or kidney stones. It might also be used to monitor conditions like kidney disease, certain cancers, or after treatments that affect how your body processes uric acid.

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to fast for 8–12 hours before the test if it involves drawing blood. If it’s a urine test, you might need to collect a sample over a 24-hour period. Always follow your provider’s instructions.

During the Test

For a blood test, a small needle will be used to draw blood from a vein in your arm. For a urine test, you’ll collect a sample in a container at home or at the lab. The sample will then be sent to a lab for analysis.

What the Results Mean

Results are compared to a general reference range, but exact values can vary by lab. High levels may suggest conditions like gout, kidney problems, or certain metabolic disorders. Low levels might indicate liver disease or certain genetic conditions.