Carnitine in Cerebrospinal Fluid (Carnitine CSF)
This test measures the amount of carnitine, a substance that helps move fatty acids into cells for energy production, in your cerebrospinal fluid (the fluid surrounding your brain and spinal cord).
["Carnitine in CSF may help assess metabolic or neurological conditions affecting energy production."]
Key facts at a glance
- LOINC
- 53076-6
- Short code
- Decenoylcarn CSF-sCnc
- Synonyms
- Decenoylcarn 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 carnitine deficiency or metabolic disorders. It may also be used to monitor conditions such as mitochondrial disorders, organic acidemias, or other metabolic syndromes that affect how your body uses fats and energy.
What to Expect Before the Test
No special preparation is typically needed. You may be asked to fast for a few hours before the test, but this is not always required. Your provider will explain any specific instructions. The procedure involves a simple lumbar puncture (spinal tap) where fluid is collected from your lower back.
What to Expect During the Test
During the test, you’ll lie on your side with your knees bent. A needle is gently inserted into your lower back to collect a small amount of cerebrospinal fluid. You may feel pressure or a slight ache, but it usually doesn’t cause pain. The procedure takes about 10–15 minutes.
What to Expect After the Test
After the test, you may feel mild soreness or discomfort at the injection site. You’ll need to lie flat for a short time to help prevent any bleeding. Stay hydrated and avoid heavy lifting or strenuous activity for a few hours. Report any severe pain, swelling, or signs of infection (like increased redness or fever) to your provider.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Low levels of carnitine in CSF can indicate underlying metabolic disorders, such as primary carnitine deficiency or mitochondrial diseases. Elevated levels may suggest certain neurological conditions or exposure to toxins. This test helps diagnose or monitor conditions affecting energy metabolism in the brain and spinal cord.
Short name
Carnitine Level (CSF)
Frequently asked questions
What does a low carnitine level in CSF mean?
How is carnitine in CSF different from carnitine in blood?
Can diet 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