Ketones in Blood Test
A ketones in blood test measures the level of ketones in your blood. High levels can be a sign of diabetic ketoacidosis (DKA), a serious condition that needs immediate medical care.
What this test measures
This test measures the amount of ketones in your blood. Ketones are acids made when your body breaks down fat for energy instead of glucose.
What your results mean
Reference ranges vary by laboratory and by your age and sex. MedlinePlus does not publish a single normal range for this test — always read your result against the range printed on your own lab report and discuss it with your provider.
Higher-than-normal results
A high or positive result means you have ketones in your blood. If levels are very high and you have symptoms, you may have ketoacidosis. In people with diabetes, this is likely diabetic ketoacidosis (DKA). In people without diabetes, it may be due to alcohol use disorder, malnutrition, or not eating for long periods.
Frequently asked questions
What are ketones?
Ketones are acids that your body makes when it breaks down fat for energy instead of glucose.
Why is this test done?
The test is mostly used to check for diabetic ketoacidosis (DKA) in people with diabetes, especially when they are sick or pregnant.
Can I test for ketones at home?
Yes, at-home blood testing meters that check both glucose and ketones are available. Urine testing may also be an option. Talk to your provider about which is right for you.
What does a normal result mean?
A normal or negative result usually means your body is not making too many ketones and you don't have ketoacidosis. But it doesn't always rule out early DKA.
What should I do if my ketones are high?
If you have high ketones and symptoms, you may have ketoacidosis and need hospital treatment. Talk to your provider about your results.
Related lab tests
Sources
- MedlinePlus: Ketones in Blood — NIH MedlinePlus
Last updated . Information is aggregated from official public sources and is not a substitute for professional medical care.