Carnitine in Cerebrospinal Fluid (Carnitine CSF)
This test measures the amount of carnitine, a substance that helps transport fatty acids into cells for energy production, in your cerebrospinal fluid (the fluid surrounding the brain and spinal cord).
["Carnitine in CSF may help assess metabolic or neurological conditions affecting energy metabolism."]
Key facts at a glance
- LOINC
- 54321-5
- Short code
- Octanoylcarn CSF-sCnc
- Synonyms
- Octanoylcarn CSF-sCnc
- Category
- chemistry
- Sample
- csf
- Container
- Sterile tube
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Specimen volume
- 1-2 mL
- Stability
- Immediate analysis required, Refrigerated: 1h
- Hemolysis max
- 200
- TAT
- 4–24 hours
- Order
- routine
Why This Test Might Be Ordered
Your healthcare provider may recommend this test if you have symptoms like fatigue, weakness, or neurological issues that could be linked to metabolic disorders. It may also be used in research or specialized clinical settings to evaluate carnitine status in the central nervous system.
What to Expect Before the Test
No special preparation is typically required. You may be asked to fast or avoid certain foods for a few hours before the test, depending on the clinical context. Your provider will explain any specific instructions.
How the Test Is Performed
A sample of cerebrospinal fluid is collected through a procedure called a lumbar puncture (spinal tap). A needle is inserted into the lower back to draw fluid into a container. This is usually done in a hospital or clinic setting under sterile conditions.
What the Results Mean
Results are interpreted by your healthcare provider based on clinical context, symptoms, and other test results. Abnormal levels may suggest conditions affecting carnitine metabolism or neurological function, but exact interpretations depend on your overall health and medical history.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Abnormal carnitine levels in CSF can be associated with metabolic disorders such as mitochondrial diseases, carnitine deficiency syndromes, or neurological conditions affecting fatty acid metabolism. It may also be part of a broader evaluation for unexplained neurological symptoms or research studies focused on central nervous system metabolism.
Short name
Carnitine Level (CSF)
Frequently asked questions
What causes abnormal carnitine levels in CSF?
How often should this test be repeated?
Can diet or lifestyle changes affect carnitine levels in CSF?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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