Uric acid is a substance the body naturally produces when it breaks down purines, compounds found in the body's cells and in certain foods and beverages. The kidneys remove most uric acid from the body through urine. However, high uric acid levels in the blood may be associated with an increased risk of gout or certain types of kidney stones, particularly when the elevation persists or other contributing factors are present.
A uric acid test measures the amount of this substance in the blood. In some cases, uric acid may also be measured in urine, depending on the symptoms and medical history. However, a high result does not necessarily indicate a disease, just as a normal result does not rule out every condition associated with uric acid. Results should therefore be interpreted alongside symptoms, a medical examination, and other test results when necessary.
In this guide, we explain normal uric acid levels, the main causes of elevated levels, the relationship between uric acid, gout, and kidney stones, and how to prepare for the test and understand your results.
What Is a Uric Acid Test?
A uric acid test, also known as a Uric Acid or Serum Uric Acid test, is a laboratory test that measures the concentration of uric acid in a blood or urine sample. Uric acid is produced when the body breaks down substances called purines. These compounds occur naturally in the body and are also found in foods such as red meat, organ meats, and certain types of seafood.
Under normal conditions, uric acid dissolves in the blood, and the kidneys remove most of it through urine. If the body produces more uric acid than usual or the kidneys cannot eliminate it efficiently, its level in the blood may increase. This condition is known as hyperuricemia, or high uric acid in the blood.
A doctor may recommend a uric acid test to help assess symptoms such as joint pain and swelling, investigate suspected gout or kidney stones, or monitor uric acid levels in someone receiving treatment to lower them. In certain cases, measuring uric acid in urine may also help evaluate how much of the substance the body is eliminating.
At Nawat Advanced Medical Laboratory, patients can undergo the laboratory tests recommended by their doctors to help assess their health. However, test results should always be considered alongside symptoms and medical history rather than interpreted as isolated numbers.
Editorial Note: What Is a PSA Test?
The heading "What Is a PSA Test?" appears in the original outline, but a PSA test measures prostate-specific antigen and is not directly related to uric acid. It should therefore be replaced with a relevant heading, such as "What Is Uric Acid and How Does the Body Produce It?" to maintain the article's medical accuracy and topical consistency.
When Does a Doctor Recommend a Uric Acid Test?
A uric acid test is not routinely required for everyone. Instead, a doctor determines whether it is necessary based on symptoms, risk factors, or the purpose of monitoring. The test may be recommended in the following situations:
- Suspected gout: When a person experiences sudden episodes of severe pain, redness, and swelling in a joint, particularly the joint at the base of the big toe.
- Suspected kidney stones: If symptoms such as severe pain in the side or back, or blood in the urine, occur, a doctor may request several tests, which may include a uric acid test.
- Treatment monitoring: To assess how well medications intended to lower uric acid levels are working.
- Evaluation of certain medical conditions: Such as some kidney disorders or conditions that cause increased cell breakdown, depending on the doctor's assessment.
- Assessment of risk factors: When there is a history of gout, kidney stones, or other factors that make measuring uric acid levels necessary.
It is important to remember that these symptoms can have different causes. Therefore, the test alone is not enough to establish a diagnosis, and additional investigations may be needed depending on the patient's condition.
What Are Normal Uric Acid Levels?
Normal uric acid levels vary according to sex, age, and the testing method used by the laboratory. Therefore, there is no single reference value that applies to everyone. In general, commonly used reference ranges for adults are approximately 3.0–7.0 mg/dL for women and 4.0–8.0 mg/dL for men. However, the reference limits may differ slightly between laboratories depending on the equipment and measurement method.
It is important to compare your result with the reference range shown on your laboratory report. A high or low value should not be considered a definitive diagnosis without medical evaluation.
How Reference Ranges Vary by Laboratory and Sex
Reference limits can differ between laboratories. Results may also be affected by age, overall health, and certain medications. When reviewing a uric acid test, it is therefore important to consider the reported value alongside its unit of measurement and the reference range provided by the laboratory.
For people with gout who are receiving treatment, the doctor may set a treatment target that is lower than the general reference range. The usual goal is to reduce uric acid levels to below 6 mg/dL. In some cases, a lower target may be appropriate depending on disease severity and the doctor's assessment.
Causes of High Uric Acid
High uric acid may occur when the body produces excessive amounts of it or when the kidneys cannot eliminate it efficiently. Possible causes and contributing factors include:
- Reduced kidney function: The body's ability to eliminate uric acid may decrease when the kidneys become less effective at filtering waste products.
- Purine-rich foods: Such as red meat, organ meats, and certain seafood, including sardines and shellfish.
- Alcoholic beverages and sugary drinks: These may be associated with higher uric acid levels and an increased risk of gout attacks in some people.
- Excess body weight and metabolic disorders: These factors may be associated with elevated uric acid.
- Certain medications: Diuretics are one example, although other medications may also affect uric acid levels.
- Increased cell breakdown: This may occur in certain medical conditions or during specific treatments, such as some types of chemotherapy.
Having one of these risk factors does not mean that high uric acid will inevitably develop. The likelihood depends on a combination of health, genetic, and environmental factors. Do not stop taking any prescribed medication to improve your test result without consulting your doctor.
What Is the Link Between Uric Acid and Gout?
Gout is a type of inflammatory arthritis that develops when crystals of urate, which form from uric acid, accumulate in or around a joint. This can cause sudden attacks of severe pain, swelling, redness, and warmth in the affected area.
Gout commonly affects the joint at the base of the big toe, but it can also affect the ankle, knee, and other joints. An attack may begin suddenly, sometimes during the night, and the affected joint can become extremely sensitive to touch or movement.
High uric acid levels are associated with an increased likelihood of these crystals forming. However, the relationship is not straightforward in every case. Some people have elevated levels without developing symptoms, while blood uric acid levels may be normal or lower than usual during an acute gout attack.
A doctor may request a uric acid test to support the assessment, but additional investigations may also be needed. These can include examining joint fluid for crystals or using imaging tests in specific situations. Joint fluid analysis is an important method for confirming the diagnosis when the clinical picture is unclear.
Does High Uric Acid Mean You Have Gout?
No. Having high uric acid in the blood does not necessarily mean that a person has gout. Some people have elevated levels without experiencing joint pain or swelling, and they may not need medication to lower uric acid unless other medical reasons or risks make treatment necessary.
On the other hand, a normal result does not completely rule out gout, particularly if the test is performed during an acute attack. For this reason, diagnosis depends on several factors, including the nature and frequency of symptoms, a physical examination, and other test results when needed.
If the result shows elevated uric acid, the doctor may recommend reviewing dietary habits, drinking an appropriate amount of water if there are no medical restrictions on fluid intake, monitoring kidney function, or repeating the test depending on the situation. Medication to lower uric acid is considered based on the patient's medical history, recurrent attacks or complications, and the doctor's assessment of potential benefits and risks.
What Is the Link Between Uric Acid and Kidney Stones?
Uric acid may contribute to kidney stone formation in two main ways: elevated levels in the blood or an increased concentration of uric acid in the urine under conditions that encourage crystal formation. Uric acid stones are one type of kidney stone, but they are not the only type. Kidney stones can also form from other minerals and salts.
Kidney stones may cause severe pain in one side of the back or flank, or pain that spreads to the lower abdomen or groin. Other symptoms may include blood in the urine, nausea, or pain during urination. If these symptoms are accompanied by a fever, chills, or severe difficulty passing urine, urgent medical evaluation is necessary.
A doctor may request blood and urine uric acid tests to help assess certain cases of kidney stones. However, identifying the type and cause of a stone may require analysis of the stone itself, urine tests, kidney function tests, or medical imaging.
Preventing recurrent stones depends on their type and underlying cause. Recommendations may include increasing fluid intake when medically appropriate, making dietary changes, and sometimes taking medications prescribed by a doctor.
Is Uric Acid Measured in Blood or Urine?
Uric acid can be measured in either blood or urine. The doctor chooses the appropriate test based on the medical question that needs to be answered.
- Blood uric acid test: Measures the concentration of uric acid in a blood sample. It may be used when gout is suspected, to monitor levels during treatment, or as part of the evaluation of certain medical conditions.
- Urine uric acid test: Helps measure the amount of uric acid eliminated by the body. A doctor may request a 24-hour urine collection to evaluate certain cases of kidney stones or assess the risk of stone formation.
Neither test can always replace the other. A high blood level does not, by itself, show how much uric acid is being excreted in the urine. Similarly, urine results must be interpreted according to the collection method and the purpose of the test.
If your doctor requests a 24-hour urine collection, it is essential to follow the laboratory's instructions carefully. Failing to collect the entire sample may affect the accuracy of the result.
Do You Need to Fast Before a Uric Acid Test?
A uric acid test does not always require fasting. However, your doctor or laboratory may ask you to avoid food and drinks for a specific period before the blood sample is collected, depending on the type of test and whether other tests are being performed at the same time.
Before undergoing a uric acid test, follow the instructions provided by the laboratory and inform your doctor about any medications or dietary supplements you use. Certain medications, such as diuretics and aspirin, as well as some other treatments, may affect uric acid levels or the interpretation of the results.
Do not stop taking prescribed medication or change its dose on your own before the test. If you are having a 24-hour urine uric acid test, you will need to follow specific instructions for collecting and storing the sample.
How to Interpret Your Results and What to Do Next
Uric acid test results should be interpreted by comparing the measured level with the reference range on the laboratory report and considering the patient's symptoms, health condition, and medications. In general, results may fall into three categories:
- Within the reference range: This means the result falls within the limits used by the laboratory. However, it does not rule out gout or another condition if symptoms are present.
- Above the reference range: This may be associated with increased uric acid production or reduced elimination through the kidneys. However, the result alone does not confirm gout or kidney stones.
- Below the reference range: This may occur for several reasons, including the effects of certain medications or medical conditions. The doctor determines whether further testing is necessary.
If the result is elevated, the doctor may recommend reviewing dietary habits, assessing kidney function, or performing additional tests depending on the symptoms. Certain lifestyle changes may help reduce risk factors, such as limiting red meat, organ meats, some seafood, and sugary drinks. Maintaining adequate hydration is also recommended unless a doctor has advised limiting fluid intake.
People who experience recurrent gout attacks or kidney stones associated with uric acid may need medication and regular monitoring. The appropriate treatment differs from one person to another. Therefore, you should not start or stop uric acid-lowering medication without medical guidance.
The best way to benefit from the test is to interpret the result according to the laboratory's reference range and consult a doctor if symptoms occur or levels remain elevated. Appropriate medical assessment and follow-up can help determine the next steps instead of relying on a single result or trying treatment without professional advice.
If your doctor has recommended measuring uric acid to check your levels or help investigate symptoms associated with gout or kidney stones, visit the Nawat Advanced Medical Laboratory website to learn more about the laboratory's services and available tests. Follow the preparation instructions carefully and discuss your results with your doctor to receive an appropriate assessment for your condition.
Frequently Asked Questions
What happens if your uric acid is high?
If your uric acid test shows high levels, it can lead to gout, kidney stones, or joint damage if left untreated. To monitor your levels and prevent complications, book a screening at nawatlab.com.
What is a normal uric acid level?
A normal uric acid test result typically ranges from 3.5 to 7.2 mg/dL for men and 2.6 to 6.0 mg/dL for women. To check your exact levels with accurate lab results, visit nawatlab.com.
Which time is best for a uric acid test?
The uric acid test is best performed in the morning, and while fasting is not always required, your doctor may recommend it for the most accurate reading. To schedule your morning test easily, visit nawatlab.com.
What are the 10 foods that trigger uric acid?
Foods that trigger high uric acid include red meat, organ meats, shellfish, sardines, alcohol, sugary drinks, and certain vegetables. A uric acid test helps determine if you need dietary changes, which you can book at nawatlab.com.
What foods remove uric acid from your body?
Foods that help remove uric acid include cherries, citrus fruits, low-fat dairy, and plenty of water, which support kidney excretion. To monitor the effectiveness of your diet, schedule a uric acid test at nawatlab.com.
Conclusion
A uric acid test helps assess uric acid levels in the blood or urine. It may be an important part of diagnosing gout, evaluating certain types of kidney stones, and monitoring treatment. However, the result alone is not enough to confirm a diagnosis. Normal uric acid levels also vary according to the laboratory, sex, and medical context.
Understanding your result in relation to the laboratory's reference range and your overall health is essential. If you have symptoms or persistently elevated levels, consult your doctor about the appropriate follow-up tests and treatment options.
Reliable Medical Sources
- MedlinePlus – Uric Acid Test: Explains why the test is performed, the difference between blood and urine testing, and what the results may indicate.
- https://medlineplus.gov/lab-tests/uric-acid-test/
- Al-Tibbi – Uric Acid Test: An Arabic-language reference explaining the test and its uses.
- https://altibbi.com/الفحوصات-والتحاليل/حمض-اليوريك-16
- National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS) – Gout: Diagnosis, Treatment, and Steps to Take: Provides information about gout diagnosis, treatment options, and lifestyle changes.
- https://www.niams.nih.gov/health-topics/gout/diagnosis-treatment-and-steps-to-take