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Uric Acid, Serum or Plasma

Published: August 9, 2026Updated: August 16, 2026

This test measures the amount of uric acid in your blood, a natural substance produced when your body breaks down certain foods and substances, including purines found in meat and seafood.

Quick summary

["Uric acid levels help assess kidney function and risk of gout or kidney stones."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
9955-6
Short code
QRS dur L-V1
Synonyms
QRS dur L-V1
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
ekg
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why This Test Matters

Uric acid is a waste product that your kidneys normally filter out of your blood. High levels can indicate problems like kidney disease, gout, or conditions that increase uric acid production, such as certain cancers or genetic disorders.

What to Expect Before the Test

No special preparation is needed. You may drink water before your blood draw, but avoid alcohol for 24 hours beforehand. If you’re on a low-purine diet (e.g., for gout), follow your doctor’s advice.

What the Test Involves

A healthcare provider will take a small blood sample from a vein in your arm using a needle. You may feel a brief pinch, but it usually doesn’t cause discomfort. The sample is sent to a lab for analysis.

Possible Results and Interpretation

Results are compared to a reference range for your age and sex. Low levels may suggest kidney issues or certain medications, while high levels often point to conditions like gout, kidney disease, or metabolic disorders.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Elevated uric acid is commonly associated with gout (joint pain/crystals), kidney stones, or metabolic syndrome. Low levels may signal overproduction of purines, kidney dysfunction, or certain medications (e.g., diuretics). Always discuss results with your doctor for personalized interpretation.

Short name

Uric Acid

Frequently asked questions

What causes uric acid levels to be too high?
High uric acid can result from diet (rich in purines), kidney problems, genetics, or conditions like diabetes or obesity. Lifestyle factors (e.g., alcohol, dehydration) also play a role.
How often should I get this test?
Your doctor may order this test periodically if you have risk factors (e.g., gout history, kidney issues) or symptoms like joint pain. Follow-up depends on your overall health and test results.
Can diet or lifestyle changes affect uric acid levels?
Yes! Reducing purine-rich foods (e.g., organ meats, shellfish), staying hydrated, and maintaining a healthy weight may help lower uric acid. Always consult your doctor before making major dietary changes.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy