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Urine Ketones (Qualitative, 24-Hour Collection)

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

This test checks for the presence of ketones in your urine over a 24-hour period, which can indicate your body is breaking down fat for energy instead of carbohydrates.

Quick summary

["Ketones in urine may signal metabolic issues or dietary changes."]

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

Key facts at a glance

LOINC
12449-5
Short code
Ketones 1h p chal Ur Strip-mCnc
Synonyms
Ketones 1h p chal Ur Strip-mCnc
Category
chemistry
Sample
urine
Container
Sterile urine container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
test-strip
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 healthcare provider may order this test if you have symptoms like excessive thirst, frequent urination, unexplained weight loss, nausea, or vomiting. It’s also used to monitor conditions like diabetes, uncontrolled blood sugar, or metabolic disorders where fat breakdown can occur.

What to Expect Before the Test

You’ll collect all urine produced in a 24-hour period (typically from midnight to midnight) in a clean container. Avoid using diapers or catheters. Drink plenty of water to help flush ketones naturally.

How the Test Works

The collected urine is tested for the presence of acetone, acetoacetate, or beta-hydroxybutyrate—common ketone bodies—using a chemical reaction that changes color. Results are qualitative (positive/negative) rather than a numeric value.

What the Results Mean

Positive results (ketones detected) may mean your body is using fat as fuel, which can happen with diabetes, starvation, or excessive exercise. Negative results mean no ketones were found in your urine sample.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Urine Ketones

Frequently asked questions

How long does it take to get results?
Results are typically available within 1–2 business days, depending on lab processing times. Your provider will discuss them with you during your follow-up visit.
What causes ketones to appear in urine?
Ketones in urine often appear when your body burns fat for energy, such as during fasting, low-carb diets, uncontrolled diabetes, or severe dehydration. Stress or illness can also trigger this.
Can I drink alcohol before this test?
Yes, but avoid heavy alcohol use, as it may temporarily raise ketone levels. Stick to moderate consumption and follow your provider’s specific instructions.
  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