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Uric Acid in Urine (24-Hour Collection)

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, over a full day. It helps assess how well your kidneys are removing uric acid from your body.

Quick summary

["This test helps identify kidney function and potential uric acid buildup risks."]

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

Key facts at a glance

LOINC
2598-1
Short code
Magnesium Ur-sCnc
Synonyms
Magnesium Ur-sCnc
Category
electrolyte
Sample
urine
Container
Sterile urine container
Units
N/A
Ref low
1.7
Ref high
2.2
Critical range
1 N/A – 5 N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
83735
Specimen volume
10 mL
Stability
Room temperature: 2h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

Why This Test Is Done

Your doctor may order a 24-hour urine uric acid test if they suspect kidney problems, such as kidney stones, gout, or other conditions affecting how your body processes uric acid. It can also help monitor long-term kidney health or check for overproduction of uric acid.

What to Expect Before the Test

You’ll need to collect all your urine for a full 24-hour period, starting after you wake up in the morning. Store the urine in a refrigerator until you return it to the lab. Follow your doctor’s instructions carefully to ensure accurate results.

How the Test Is Done

After completing the 24-hour urine collection, you’ll provide the sample to your lab. The lab will analyze the urine to measure uric acid levels. No special preparation is needed beyond following the collection instructions.

What the Results Mean

Results help determine if your kidneys are effectively removing uric acid or if there’s an excess buildup that could lead to health issues like kidney stones or gout. Your doctor will interpret the results in the context of your overall health.

Reference range

Adult: 1.7-2.2 mg/dLN/A

Specimen: urine

No special preparation required. Stay well hydrated.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

24-Hour Urine Uric Acid

Frequently asked questions

How often should I get this test?
This test is typically done once or occasionally, depending on your health condition. Your doctor will decide how often you need it based on your medical history and symptoms.
What foods or medications affect uric acid levels?
Dietary choices like high-purine foods (e.g., red meat, organ meats) or certain medications (e.g., low-dose aspirin, diuretics) can influence uric acid levels. Always discuss your diet and medications with your doctor before the test.
Can I drink alcohol before this test?
Alcohol may affect uric acid levels, so it’s best to avoid it for a few days before your test. Follow your doctor’s specific instructions for dietary or lifestyle adjustments.
  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