Also seen on reports as: SUA, Serum Urate, S. Uric Acid
What is Uric Acid?
Uric acid is a waste product formed when the body breaks down purines — compounds found naturally in the body's own cells and also in certain foods (red meat, organ meats, seafood, some pulses and lentils in smaller amounts, alcohol, and sugary drinks containing fructose). The kidneys normally remove most of the uric acid in urine, with a smaller amount leaving through the gut.
When the body makes more uric acid than the kidneys can remove, the level in blood rises. Persistently raised uric acid can lead to crystals forming in joints (causing gout, the classic 'big toe' attack) or in the kidneys (causing uric acid kidney stones).
The test is run on a small blood sample drawn from a vein. NABL-accredited Indian labs report serum uric acid in milligrams per decilitre (mg/dL). Men generally have higher reference ranges than women.
Why doctors order it
Uric acid is most commonly ordered when symptoms suggest gout — a sudden, painful, red, hot, swollen joint, classically the big toe but possible in any joint. It is also ordered in people being investigated for kidney stones (uric acid stones are one possible type) and in tumour lysis syndrome during chemotherapy.
In Indian practice, uric acid is increasingly part of routine health checks alongside lipid profile and fasting sugar, because raised uric acid correlates with metabolic syndrome — central obesity, type-2 diabetes, fatty liver, and cardiovascular risk. All of these are very common in urban Indian adults.
It is sometimes monitored during the work-up of joint pain, in chronic kidney disease (uric acid often rises as kidney function falls), in some forms of anaemia, in pregnancy-related blood pressure problems (uric acid rises in pre-eclampsia), and to assess response to gout-lowering medication.
What the result means
Raised uric acid (hyperuricaemia) does not by itself diagnose gout — many people have persistently raised uric acid without ever developing gout, and some people get gout with apparently normal levels. The diagnosis of gout is made clinically — typically from the joint pattern and history — sometimes confirmed by examining joint fluid under a microscope.
Raised uric acid does, however, increase the risk of gout over time, particularly when it stays well above the upper limit. It is also linked with metabolic syndrome, type-2 diabetes, hypertension, fatty liver, and cardiovascular events — though whether raised uric acid causes these or simply travels with them is still being studied. Doctors usually treat raised uric acid with medication only when there is gout, kidney stones, or specific other reasons.
Low uric acid is uncommon and rarely concerning. It can be seen in some genetic conditions, in severe liver disease, on certain medications, or in pregnancy. It does not typically need treatment on its own.
Reference range
Values in mg/dL — adult non-pregnant ranges
- Adult men — typical range
- Roughly 3.4 – 7.0 mg/dL
- Adult women — typical range
- Roughly 2.4 – 6.0 mg/dL
- Hyperuricaemia
- Above the lab's upper limit — does not by itself diagnose gout
- Gout risk increases
- Particularly when persistently >7 mg/dL in men or >6 mg/dL in women
- Treatment-on-medication target
- Doctors usually aim for <6 mg/dL during gout-lowering treatment; lower in some situations
A raised uric acid number alone does not equal gout. The diagnosis is clinical — based on joint pattern, history, and sometimes joint-fluid examination. Treatment with uric-acid-lowering medication is usually reserved for people with gout, kidney stones, or specific other indications.
Common factors that affect the result
Diet has a real but limited effect. Foods high in purines — red meat, organ meats (kidney, liver, brain), oily fish like sardines and anchovies, alcohol (particularly beer), and sugary drinks sweetened with fructose — raise uric acid. Among Indian dietary patterns, regular alcohol use and high non-vegetarian intake are common drivers. Pulses (dal) and dark leafy vegetables (palak) contain moderate purines but have less impact than animal sources for most people.
Body weight, insulin resistance, and metabolic syndrome are strong drivers of raised uric acid. Many Indian adults with central obesity, type-2 diabetes, or fatty liver have raised uric acid as part of the same metabolic picture — and weight loss often lowers it.
Several medications raise uric acid — common diuretics (used for blood pressure or leg swelling, particularly thiazides and loop diuretics like furosemide), low-dose aspirin, niacin, some TB medications (especially pyrazinamide), and cyclosporine. Some lower it — losartan (a common blood pressure medication) and fenofibrate are mild uric-acid-lowering examples. Severe dehydration also raises uric acid acutely.
When to talk to your doctor
- You have a sudden, painful, red, hot, swollen joint — particularly the big toe, ankle, or knee — alongside any uric acid level, normal or raised. This is a classic gout presentation and needs prompt treatment.
- Your uric acid is persistently above the upper limit, especially if you have risk factors — metabolic syndrome, central obesity, type-2 diabetes, hypertension, or a family history of gout.
- You have a history of kidney stones — particularly uric acid stones — and your uric acid is raised.
- You are starting chemotherapy and your uric acid is being monitored for tumour lysis syndrome.
- You are pregnant and uric acid is rising alongside high blood pressure — this combination warrants urgent obstetric review.
Related tests
Sources
- Indian Rheumatology Association — Gout Management Recommendations — Indian Rheumatology Association
- ICMR CKD Screening Guidelines — Indian Council of Medical Research
- EULAR Recommendations for the Management of Gout — European League Against Rheumatism
- ACR Guidelines for the Management of Gout — American College of Rheumatology
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