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Isovalerylcarnitine (Carnitine Metabolite)

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

This test measures the level of isovalerylcarnitine, a breakdown product of amino acids in your body. It helps assess metabolic function, particularly in conditions affecting fat and amino acid metabolism.

Quick summary

["Isovalerylcarnitine levels may indicate metabolic disorders or how your body processes certain nutrients."]

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

Key facts at a glance

LOINC
54308-2
Short code
Isovalerylgly CSF-sCnc
Synonyms
Isovalerylgly CSF-sCnc
Category
glucose
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 unexplained fatigue, muscle weakness, or signs of metabolic issues. It’s also used in diagnosing or monitoring conditions such as inherited metabolic disorders, including medium-chain acyl-CoA dehydrogenase (MCAD) deficiency or other organic acidemias.

What to Expect Before the Test

No special preparation is typically required, but you may need to fast for a certain period if the test involves a blood draw. Always follow your healthcare provider’s instructions. If you’re taking medications, let them know beforehand.

How the Test Works

A small sample of blood, plasma, or serum is collected and analyzed using a specialized laboratory technique, often high-performance liquid chromatography (HPLC), to measure the concentration of isovalerylcarnitine.

What the Results Mean

Results are compared to a reference range specific to the lab. Elevated levels may suggest metabolic disorders, while lower levels might indicate other health concerns or specific dietary factors. Your doctor will interpret the results in the context of your overall health and symptoms.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Isovalerylcarnitine

Frequently asked questions

What causes isovalerylcarnitine levels to change?
Changes in isovalerylcarnitine levels can be due to genetic disorders that impair metabolism, infections, severe illness, fasting, or certain medications. If you suspect a metabolic issue or have symptoms like vomiting, lethargy, or unusual smells, discuss these with your doctor.
How often should I get this test?
The frequency depends on your health status and diagnosis. If you have a known metabolic disorder, your doctor may recommend regular monitoring. Otherwise, this test is usually ordered as needed for specific symptoms or investigations.
Can diet affect isovalerylcarnitine levels?
Yes, diet can influence levels. Certain amino acids and fats may be metabolized differently, potentially affecting isovalerylcarnitine concentrations. If you’re on a special diet or have dietary restrictions, inform your healthcare provider before testing.
  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