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Carnosine in Cerebrospinal Fluid (Mass Concentration)

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

This test measures the amount of carnosine, a naturally occurring dipeptide found in cerebrospinal fluid (CSF). Carnosine plays a role in protecting nerve cells and may be studied in conditions affecting the brain or nervous system.

Quick summary

["This test helps assess potential nerve cell health or metabolic issues in the brain."]

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

Key facts at a glance

LOINC
26591-8
Short code
CARNCSF
Synonyms
Carnosine CSF-sCnc
Category
chemistry
Sample
csf
Container
Sterile, screw-cap polypropylene collection tube; cryovial suitable for ultra-low temperature storage. Avoid glass containers to prevent adsorption.
Units
N/A
Ref low
0
Ref high
1
Fasting
false
Population
adult
Sex
all
Age range
0–120 years
Method
High-Performance Liquid Chromatography (HPLC) with electrochemical or UV detection; Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
CPT
82542
Specimen volume
1.0–2.0 mL of cerebrospinal fluid (minimum 0.5 mL)
Stability
Store at 2–8°C for up to 24 hours; for prolonged storage, freeze at −70°C or below. Avoid repeated freeze-thaw cycles. Process rapidly to prevent enzymatic degradation.
Hemolysis max
200
TAT
72–336 hours
Order
routine

Why Is This Test Done?

Your healthcare provider may order this test if you have symptoms like headaches, vision changes, or neurological issues that could be linked to abnormal carnosine levels in your CSF. It may also be part of a broader evaluation for conditions like metabolic disorders, neurodegenerative diseases, or certain genetic conditions affecting amino acid metabolism.

What to Expect Before the Test

No special preparation is typically needed. You may have a lumbar puncture (spinal tap) to collect CSF, which is usually done in a hospital setting. You’ll lie on your side, and a healthcare provider will insert a needle into your lower back to draw the fluid. You might feel pressure or mild discomfort, but it’s generally well-tolerated.

What the Results Mean

Carnosine levels in CSF can vary based on health, age, and underlying conditions. While reference ranges aren’t universally standardized for this specific test, abnormal results may signal metabolic, genetic, or neurological concerns that require further evaluation by your doctor.

Common Conditions Monitored

This test may be used to investigate conditions like hereditary aminoacidopathies, mitochondrial disorders, or other metabolic syndromes affecting amino acid metabolism in the brain. It can also be part of research or specialized diagnostic protocols for rare neurological diseases.

Reference range

Reference values for carnosine in cerebrospinal fluid are not well established and may vary by laboratory methodology. Published pediatric CSF carnosine concentrations are typically very low (<1 µmol/L). Consult the performing laboratory's reference range for specific interpretive guidance.N/A

Specimen: csf

No special patient preparation is required prior to lumbar puncture. Inform the ordering physician of any medications, recent seizures, or neurological procedures as these may influence CSF composition.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Carnosine CSF

Frequently asked questions

What Does It Cost?
The cost of this test can vary widely depending on your insurance coverage, location, and healthcare provider. Check with your insurance company or clinic for specific pricing details before scheduling.
How Long Does It Take to Get Results?
Results from this test are typically available within a few days to a week, depending on lab processing times and your healthcare provider’s workflow. Follow-up with your doctor to discuss findings once they’re ready.
Is This Test Painful?
The procedure for collecting CSF involves a small needle inserted into your lower back, which may cause mild discomfort or pressure. Most people describe it as similar to a minor pinch or stretching sensation. Pain is usually short-lived, and you can rest afterward.
  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