Finding the right tests…
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Finding the right tests…
Biochemistry
Uric acid is a waste chemical your body produces when it breaks down purines, substances found naturally in your cells and in certain foods like red meat, organ meat, and some seafood. Normally your kidneys filter it out into urine, but when your body makes too much or your kidneys clear too little, uric acid builds up in the blood and can form sharp, needle-shaped crystals in and around joints — the direct cause of gout, a form of sudden, intense joint pain and swelling. This test is used both to diagnose that buildup in someone with joint symptoms and, separately, to track levels in people already managing gout on treatment.
The test reports uric acid concentration in your blood, in milligrams per decilitre. A normal range is typically quoted as roughly 3.0 to 7.1 mg/dL for women and 4.0 to 8.6 mg/dL for men, though labs vary slightly. A high result raises the likelihood of gout or kidney stones forming from uric acid crystals, while people already being treated for gout are often managed toward a lower target, commonly below 6 mg/dL, to help existing crystal deposits dissolve over time.
Uric acid can rise for several distinct reasons, and telling them apart matters for treatment. Some people simply produce more uric acid than average, often tied to diet, obesity, or certain rare inherited conditions. Others produce a normal amount but clear it less efficiently through the kidneys, which is actually the more common pattern in gout — meaning the problem is often about excretion rather than overproduction. Because the underlying cause differs, treatment approaches can differ too, which is one reason a single uric acid number doesn't fully answer why it's high.
Beyond gout, uric acid crystals can also form kidney stones, so this test is sometimes ordered when investigating recurrent stones rather than joint symptoms. Certain cancers and their treatment can also raise uric acid sharply, since rapidly dying cells release large amounts of purines at once — a pattern doctors specifically watch for during some cancer treatments.
Some versions of this test ask for a short fasting period, commonly around four hours, though this can depend on what else is being tested on the same visit — confirm directly with your doctor or the centre rather than assuming. It's a routine blood draw from a vein, and results are usually available quickly.
Roughly 3.0 to 7.1 mg/dL for women and 4.0 to 8.6 mg/dL for men are commonly used ranges, though exact cutoffs vary a little by lab.
A level below 6 mg/dL is a commonly used treatment target, aimed at helping existing uric acid crystal deposits dissolve over time. Your doctor may set a different target depending on your situation.
Yes. Many people have a raised uric acid level without ever developing gout or stones, so a high result alone isn't treated as a diagnosis — it's read alongside symptoms and other findings.
Yes, foods high in purines — red meat, organ meat, and certain seafood — can raise uric acid, though how much any individual's level responds to diet varies.
This page is general information about the test, not medical advice. Your own report's reference ranges apply — please discuss your results with your doctor.
Some versions ask for a short fast, often around four hours, but this can depend on what else is ordered with it. Confirm with your doctor or the centre.
No. Reduced clearance by the kidneys is actually the more common pattern in gout, meaning the issue is often about how efficiently the body removes uric acid rather than how much it makes.