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Acetone in Urine (Qualitative)

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

This test checks for the presence of acetone, a chemical produced when the body breaks down fat for energy, often seen in conditions like diabetic ketoacidosis or starvation.

Quick summary

["Detecting ketones in urine can help identify when your body may be using fat as fuel instead of sugar, which can be a warning sign for serious health issues."]

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

Key facts at a glance

LOINC
18235-2
Short code
Ketone Solvents Bld
Synonyms
Ketone Solvents Bld
Category
chemistry
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
3 mL
Stability
Room temperature: 4h, Refrigerated: 24h
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

Why This Test Matters

Ketones in urine can signal metabolic imbalances. While small amounts may occur normally during fasting or exercise, larger amounts can indicate dangerous conditions like diabetic ketoacidosis, where the body struggles to use sugar properly and turns to fat for energy instead. This can lead to severe dehydration, high blood sugar, and even coma if untreated.

When You Might Need This Test

Your doctor may order this test if you have symptoms like excessive thirst, frequent urination, nausea, vomiting, or unexplained weight loss. It’s also commonly used in people with diabetes to monitor blood sugar control or in those who may be at risk for metabolic disorders.

How the Test Works

The test involves collecting a small sample of your urine. The sample is tested for acetone using a chemical reaction that changes color, indicating whether ketones are present. This is a simple dipstick test often done in a doctor’s office or clinic.

What to Expect Before the Test

No special preparation is usually needed, but if you’re taking medications that affect blood sugar or metabolism, let your doctor know. Avoiding certain foods or drinks (like alcohol or sugary beverages) that might influence ketone levels isn’t typically required, but your doctor may give specific instructions based on your situation.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Urine Ketones (Qualitative)

Frequently asked questions

What does a positive result mean?
A positive result (ketones detected) suggests your body is producing ketones, which can happen due to low blood sugar, high protein or fat intake, illness, or certain medical conditions. It’s important to discuss your results with your healthcare provider to determine the cause and next steps, such as adjusting your diet or medication.
What does a negative result mean?
A negative result means no ketones were detected in your urine sample. This doesn’t necessarily mean your body isn’t producing ketones elsewhere (like in blood), but it indicates that the ketones were below detectable levels in this test. Your provider may recommend further testing if they suspect a metabolic issue.
How often should I get this test?
The frequency depends on your health condition. If you have diabetes or another metabolic disorder, your doctor may recommend regular testing to monitor ketone levels, especially if you’re experiencing symptoms like those mentioned earlier. Follow your healthcare provider’s advice for the best schedule.
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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