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Serum or plasma mass concentration of uric acid

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

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

Quick summary

["Uric acid helps identify conditions like gout or kidney issues by checking your blood levels."]

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

Key facts at a glance

LOINC
36084-2
Short code
MRA UE ves
Synonyms
MRA UE ves
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
mr-angio
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

Uric acid is a natural waste product that forms when your body breaks down purines, which are substances found in certain foods and in your own cells. Most uric acid dissolves in the blood, travels to the kidneys, and leaves the body through urine. When levels build up, sharp crystals can form in the joints and tissues, causing pain and inflammation.

Uric acid is a byproduct of purine metabolism, which your body uses to create energy. While it’s normally filtered out by your kidneys, high levels can form crystals in joints (gout) or damage kidneys over time.

Your doctor may order this test to help diagnose gout, investigate recurring kidney stones, or check how well your kidneys are working. It is also used to monitor people receiving chemotherapy or other treatments that can raise uric acid levels, and to track patients who are already being treated for gout or kidney disease.

Doctors order uric acid tests to diagnose gout, assess kidney function, or evaluate conditions like hyperuricemia (high uric acid) or certain cancers.

Before the test, tell your healthcare provider about all medicines, vitamins, and supplements you take, since some drugs such as diuretics can affect your results. You may be asked to avoid alcohol and, in some cases, to fast for several hours before your blood is drawn. Drinking water beforehand can make the blood draw easier.

No special preparation is needed, but you may fast for 8–12 hours before testing if instructed. Bring any medications you’re taking, as some (like diuretics) can affect results.

During the test, a healthcare professional will clean the skin on your arm, wrap a band around your upper arm, and collect a small sample of blood from a vein, usually in your elbow or the back of your hand. You may feel a quick pinch or sting, and the entire process typically takes less than five minutes. A small bandage is placed on the site afterward.

A healthcare provider will draw blood from a vein in your arm. It usually takes a few minutes, and you may feel a slight pinch. The sample is sent to a lab for analysis.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Uric Acid

Frequently asked questions

High uric acid levels may signal gout, kidney problems, or metabolic disorders, while low levels could indicate liver disease or certain genetic conditions. Results help guide treatment for pain, inflammation, or long-term health risks.
Typically, doctors recommend this test if you have symptoms like joint pain, kidney problems, or if you’re at risk for gout or metabolic disorders. Follow your healthcare provider’s advice for follow-up testing.
A high uric acid level may suggest gout, kidney issues, or conditions like diabetes or obesity that increase purine breakdown. Your doctor will review your symptoms and other test results to determine the cause.
Yes, diet can influence uric acid levels. Eating large amounts of red meat, organ meats, or shellfish, or drinking alcohol, especially beer, in the days before your test may raise your results. Follow any dietary instructions your provider gives you before testing so your results are as accurate as possible.
Yes, diet can influence uric acid levels. High-purine foods (like red meat, organ meats, or alcohol) may raise levels temporarily. Your doctor may recommend dietary adjustments if uric acid is elevated.
How often you need this test depends on your overall health. Many people only have it as part of routine bloodwork, while those with gout, kidney disease, or ongoing cancer treatment may need it several times a year. Your doctor will recommend a testing schedule based on your levels, your symptoms, and how well your treatment is working.
  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