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Palmitoylcarnitine in Serum/Plasma (Mass Concentration)

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

This test measures the amount of palmitoylcarnitine, a fatty acid derivative, in your blood. It helps assess how well your body is processing fats, particularly in conditions affecting metabolism or muscle function.

Quick summary

["This test may help diagnose or monitor metabolic disorders linked to fat metabolism."]

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

Key facts at a glance

LOINC
54325-6
Short code
Palmitoylcarn Amn-sCnc
Synonyms
Palmitoylcarn 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 a history of conditions like mitochondrial disorders, fatty acid oxidation defects, or unexplained muscle weakness. It could also be part of a broader evaluation for metabolic or genetic disorders affecting energy production.

How the Test Works

Blood is drawn from a vein, typically in your arm. The sample is then analyzed using a specialized laboratory technique to measure the concentration of palmitoylcarnitine. This process helps identify elevated or low levels that may indicate metabolic issues.

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to fast for a few hours before the test if instructed by your provider. Wear comfortable clothing and avoid tight sleeves for easy access to your vein.

What to Expect During the Test

The test involves a quick, minor procedure where a needle is inserted into your vein to collect blood. You may feel a slight pinch, but it usually takes only a few minutes. Afterward, you can resume normal activities immediately.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Elevated levels of palmitoylcarnitine can suggest metabolic disorders such as carnitine palmitoyltransferase (CPT) deficiencies or other fatty acid oxidation defects. These conditions can impair how your body uses fats for energy, potentially leading to muscle weakness, fatigue, or other symptoms. Low levels might indicate carnitine deficiency or other metabolic imbalances that require medical attention.

Short name

Palmitoylcarnitine Level

Frequently asked questions

What does a high or low result mean?
A high result may indicate an underlying metabolic disorder that affects how your body breaks down fats. This could require further testing or a specialized diet and medical management. Your healthcare provider will discuss the results in detail and determine the next steps based on your overall health and symptoms.
Do I need to prepare differently if I have a known metabolic disorder?
If you have a known metabolic disorder, your healthcare provider may give you specific instructions for fasting or timing of the test. Always follow their guidance to ensure accurate results. They may also recommend additional tests or monitoring to manage your condition effectively.
How often will I need this test?
The frequency of this test depends on your medical condition and treatment plan. Your healthcare provider will determine how often you need follow-up testing, which could range from periodic checks to more frequent monitoring as needed.
  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