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Urine Ketones (Qualitative)

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

This test checks for the presence of ketones in your urine, 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
21357-9
Short code
Ketones 1.5h p chal Ur Ql
Synonyms
Ketones 1.5h p chal Ur Ql
Category
chemistry
Sample
urine
Container
Sterile urine container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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 Might Be Ordered

Your healthcare provider may recommend this test if you have symptoms like excessive thirst, frequent urination, unexplained weight loss, nausea, or vomiting. It’s also used in monitoring conditions like diabetes, uncontrolled weight loss, or during fasting or low-carb diets.

What to Expect During the Test

You’ll collect a small sample of your urine in a clean container. The test involves dipping a special stick into the urine and changing color to indicate whether ketones are present. No special preparation is needed, but drinking plenty of water can help dilute urine for clearer results.

What the Results Mean

If the stick turns a specific color (usually yellow, orange, or brown), ketones are present. The intensity of the color can sometimes suggest the level, though exact amounts aren’t always measured. Always discuss results with your provider.

Common Conditions Monitored

Ketone tests help track conditions like diabetic ketoacidosis, starvation, or prolonged fasting. They’re also used in people with metabolic disorders or those following strict diets to prevent dangerous ketone buildup.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Urine Ketone Test

Frequently asked questions

How often should I get this test?
The frequency depends on your health condition. If you have diabetes or are monitoring ketones due to dietary changes, your provider may recommend testing every few days or as needed. Always follow their guidance.
What causes ketones in urine?
Ketones appear when your body breaks down fat for energy, often due to low carbohydrate intake, starvation, excessive exercise, or certain metabolic disorders. Diabetes (especially uncontrolled) is a common cause, but other factors like alcohol use or illness can also trigger them.
Can I eat or drink before the test?
No special diet is required, but drinking water can help dilute urine for clearer results. Avoid strong-smelling foods (like asparagus) that might interfere with the test stick’s accuracy. If you’re fasting or have specific dietary restrictions, check with your provider first.
  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