Uric Acid (Urate) Blood Test: What the Results Mean

Uric acid is a waste product made when the body breaks down purines from food and cells. A blood test measures how much circulates, helping check for gout risk or kidney function. Abnormal results should be reviewed with a healthcare provider who knows your health history.

Uric acid is produced when the body metabolizes purines, compounds found in certain foods like red meat, organ meats, and some seafood, as well as compounds released when cells break down naturally. Most uric acid dissolves in the blood, passes through the kidneys, and leaves the body in urine. The rest is broken down in the digestive tract. A serum uric acid test measures the amount of this compound circulating in the bloodstream at the time of the blood draw. Because uric acid levels reflect both how much the body produces and how well the kidneys clear it, this marker offers a window into purine metabolism and kidney filtration together, rather than either process alone.

Clinicians often order a uric acid test when someone reports joint pain, swelling, or redness that could be linked to gout, since high levels can be associated with crystal formation in joints. The test may also be included as part of a kidney panel, alongside markers like creatinine and BUN, to help evaluate how well the kidneys are filtering waste. It can be checked before or during treatment for certain cancers, since rapid cell breakdown can raise uric acid, and it may be monitored in people taking specific medications or following particular diets.

Uric acid reference ranges differ slightly by sex and often vary somewhat between laboratories, since testing methods and equipment can differ. The table below shows typical adult ranges reported by one laboratory source; always compare your own results with the range listed on your lab report rather than a general guide.

A higher-than-typical uric acid result, sometimes called hyperuricemia, can have several possible explanations. Diets rich in purines, such as red meat, organ meats, certain seafood, and alcohol, especially beer, may raise levels. Fructose-sweetened beverages have also been linked to higher uric acid. Reduced kidney clearance is another common factor; conditions that affect how well the kidneys filter waste, which can also show up as changes in creatinine or eGFR, may allow uric acid to build up in the blood. Certain medications, including some diuretics, can raise levels as a side effect. Rapid cell turnover, such as from certain cancers, chemotherapy, or conditions causing significant tissue breakdown, can release large amounts of purines quickly. Dehydration may also concentrate uric acid in the blood temporarily. High uric acid is often linked with gout, a type of arthritis caused by crystal formation in joints, but many people with elevated levels never develop gout, and some people with gout have levels within the typical range. A healthcare provider can help interpret an elevated result alongside symptoms and other lab findings.

A lower-than-typical uric acid result is less commonly discussed but can also have several explanations. Some medications, including certain drugs used to lower blood pressure or manage other conditions, can reduce uric acid levels. A diet very low in purines, or conditions that affect how the liver processes purines, may also contribute to lower readings. Certain inherited conditions affecting kidney handling of uric acid can cause it to be excreted in larger amounts than usual. Liver disease can sometimes lower uric acid production, since much of it is generated through liver metabolism. Overhydration or excessive fluid intake may dilute blood levels temporarily. In many cases, a mildly low result has no clear clinical significance and is simply a normal variation. As with high results, a low uric acid reading is best interpreted by a healthcare provider who can consider the full clinical picture, including symptoms, medications, and other lab values such as fasting glucose.

Uric acid is often reviewed alongside other kidney-related markers, including creatinine, BUN, and eGFR, since these together give a fuller picture of how well the kidneys filter waste. Lifestyle factors such as alcohol intake, a diet high in purine-rich foods, body weight, and hydration status can all influence results, as can some medications. Because laboratories may use different testing methods and reference populations, ranges can vary somewhat from one lab report to another, so it is helpful to compare results against the range printed on your own report. Uric acid values reported in mg/dL can be converted to µmol/L using a factor of 59.48, which some international labs use instead.

If your uric acid result falls outside the typical range, consider discussing it with a healthcare provider, who can review your symptoms, medications, diet, and other lab results such as creatinine or eGFR before drawing any conclusions. Bring up any joint pain, swelling, or family history of gout or kidney stones, since these details can help guide next steps. This article is educational and does not replace a clinical evaluation. If you want help understanding a lab report, MediWing lets you upload results for a plain-language explanation and to track trends in markers like uric acid over time.