24-Hour Urine Uric Acid (Substance Concentration)

Why This Test Is Done

Your healthcare provider may recommend a 24-hour urine uric acid test if they suspect you have conditions like gout, kidney stones, or an overactive metabolism that affects how your body processes uric acid. It can also help monitor kidney function or diagnose certain metabolic disorders.

What to Expect Before the Test

You’ll need to collect all urine for a full 24-hour period, typically starting after midnight one day and ending the same time the next day. Drink plenty of fluids to help flush out uric acid naturally. Avoid certain medications that might affect uric acid levels without consulting your doctor.

How the Test Is Performed

You’ll be provided with a clean container to collect all urine. Store the sample in a refrigerator until you return it to the lab. The lab will analyze the collected urine to determine the total amount of uric acid excreted over the 24-hour period.

What the Results Mean

Results are typically reported in milligrams per deciliter (mg/dL) or milligrams per gram of creatinine, depending on the lab’s standard. High levels may indicate conditions like gout or kidney disease, while very low levels might suggest certain metabolic disorders or medications affecting uric acid metabolism.