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Palmitoylcarnitine (Carnitine-bound fatty acid metabolite)

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

This test measures the concentration of palmitoylcarnitine, a specialized fatty acid linked to carnitine in your blood. It helps assess how well your body processes fats and certain metabolic functions.

Quick summary

["Palmitoylcarnitine levels may indicate issues with fat metabolism or mitochondrial function."]

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

Key facts at a glance

LOINC
54478-3
Short code
Dicarboxypalmitoylcarn Amn-sCnc
Synonyms
Dicarboxypalmitoylcarn Amn-sCnc
Category
chemistry
Sample
fluid
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
2-5 mL
Stability
Room temperature: 2h, Refrigerated: 24h
Hemolysis max
300
TAT
4–24 hours
Order
routine

Why This Test Might Be Ordered

Your healthcare provider may recommend this test if you have symptoms or conditions related to metabolic disorders, such as unexplained muscle weakness, fatigue, or problems with energy production in cells. It may also be used in the evaluation of inherited metabolic diseases or after exposure to certain medications that affect fat metabolism.

What to Expect Before the Test

No special preparation is typically required, but you may be asked to fast for a few hours before the blood draw. If you’re taking medications that affect fat metabolism, let your provider know. The test involves drawing blood from a vein in your arm.

What the Results Mean

Results are compared to a reference range for your age and health status. Elevated levels might suggest problems with fat metabolism, mitochondrial function, or certain genetic disorders. Lower levels could indicate other metabolic or nutritional concerns.

Common Conditions Monitored

This test is often used in the context of diagnosing or monitoring conditions like medium-chain acyl-CoA dehydrogenase (MCAD) deficiency, carnitine palmitoyltransferase I (CPT I) deficiency, or other inherited metabolic disorders. It may also be part of a broader metabolic workup.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Palmitoylcarnitine

Frequently asked questions

What causes elevated palmitoylcarnitine levels?
Elevated levels may be linked to inherited metabolic disorders, certain medications that disrupt fat metabolism, or conditions affecting mitochondrial function. Always discuss your results with your healthcare provider, as they’ll consider your full medical history and other test results.
Can diet affect palmitoylcarnitine levels?
Dietary changes alone may not directly alter palmitoylcarnitine levels, but a balanced diet rich in healthy fats and proteins supports overall metabolic health. If you suspect diet is influencing your results, consult your provider for personalized advice.
How often should this test be repeated?
Frequency depends on your diagnosis and healthcare plan. If this test is part of ongoing monitoring for a metabolic condition, your provider will determine how often to repeat it. Follow their guidance closely.
  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