Uric Acid Test
Also known as: Serum Uric Acid, Urate
What is Uric Acid?
Uric acid is a waste product created when the body breaks down purines found in certain foods and drinks. It is normally filtered by the kidneys and excreted in urine.[MedlinePlus (NIH)]
What This Test Measures
This test measures the level of uric acid in your blood. High levels can lead to gout and kidney stones.[Mayo Clinic]
Why It's Important
Uric acid testing helps diagnose gout, monitor uric acid-lowering treatment, and assess kidney function.[MedlinePlus (NIH)]
High uric acid is associated with increased cardiovascular risk and metabolic syndrome.[Cleveland Clinic]
Who Should Get This Test?
Uric acid testing helps diagnose gout and monitor treatment.
Risk Factors
- Joint pain or swelling (suspected gout)
- History of gout or kidney stones
- Family history of gout
- Obesity or metabolic syndrome
- Diet high in purines (red meat, shellfish, alcohol)
- Kidney disease
- Taking diuretics or other medications that raise uric acid
- Undergoing chemotherapy (tumor lysis syndrome risk)
- Psoriasis (associated with higher uric acid)
- Monitoring uric acid-lowering therapy (allopurinol, febuxostat)
Screening Schedule
Not routine. Ordered when gout is suspected or to monitor treatment.
What Happens During the Test
A blood sample is drawn from a vein in your arm. A 24-hour urine collection may also be ordered to measure uric acid excretion.
Duration
5 minutes for the blood draw; results usually available within 24 hours
Discomfort Level
Minimal - brief pinch from needle insertion
Risks & Side Effects
Uric acid testing through blood draw carries very few risks.
- •Minor pain or bruising at the needle site
- •Slight bleeding
- •Rarely, lightheadedness
- •Very rare risk of infection
Normal Range
For men: 3.4 to 7.0 mg/dL. For women: 2.4 to 6.0 mg/dL.
Note: Levels above 7 mg/dL in men and 6 mg/dL in women increase gout risk.
Source: MedlinePlus (NIH)Unit Conversion
Convert between mg/dL and µmol/L
| mg/dL | µmol/L |
|---|---|
| 3 | 178 |
| 4 | 238 |
| 5 | 297 |
| 6 | 357 |
| 7 | 416 |
| 8 | 476 |
High Values
High uric acid (hyperuricemia) can cause gout and kidney stones. Causes include diet high in purines, obesity, kidney disease, alcohol, and certain medications.[Mayo Clinic]
Low Values
Low uric acid is uncommon and may be seen in certain liver diseases, Fanconi syndrome, or with medications that increase uric acid excretion.[Cleveland Clinic]
Test Limitations & Accuracy
Uric acid levels fluctuate and have important limitations.
- ⚠Levels can be normal during acute gout attack
- ⚠Diet significantly affects levels (fasting vs fed state)
- ⚠Alcohol intake temporarily raises uric acid
- ⚠Many medications affect uric acid (diuretics, aspirin)
- ⚠Does not confirm gout diagnosis alone (need joint fluid analysis)
- ⚠Hydration status affects levels
- ⚠Exercise and fasting can transiently raise levels
Alternative & Complementary Tests
Uric acid is one part of gout and kidney stone evaluation.
Gold standard for gout diagnosis (urate crystals)
To determine if overproduction or underexcretion
To assess kidney involvement
Advanced imaging to detect urate deposits
To visualize joint damage or tophi
Frequently Asked Questions
How can I lower my uric acid naturally?
Lower uric acid by limiting high-purine foods (red meat, organ meats, shellfish), reducing alcohol (especially beer), staying well hydrated, maintaining a healthy weight, and eating more low-fat dairy and vegetables.
Source: Mayo ClinicReferences
Related Condition Guides
Medical Disclaimer
This information is for educational purposes only and is not intended as medical advice. Always consult with a qualified healthcare provider for interpretation of test results and medical decisions.
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