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Carnitine Organic Acid Profile (Including Isovalerylcarnitine, Methylbutyrylcarnitine)

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

This test measures specific types of carnitine compounds in your blood, including isovalerylcarnitine and methylbutyrylcarnitine, which help your body use energy from fats.

Quick summary

["This test helps identify metabolic conditions affecting fat metabolism and energy production."]

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

Key facts at a glance

LOINC
54306-6
Short code
Isovaleryl+MeButyrylcarn Amn-sCnc
Synonyms
Isovaleryl+MeButyrylcarn 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 like unexplained muscle weakness, fatigue, or signs of metabolic disorders, especially in newborns or those with genetic conditions like mitochondrial disorders or organic acidemias.

What to Expect Before the Test

No special preparation is usually needed. You may fast for 8–12 hours before the blood draw, but always follow your provider’s instructions. Bring any medications you’re taking.

How the Test Works

A blood sample is taken from a vein in your arm. The sample is analyzed using a specialized laboratory technique to measure the levels of specific carnitine compounds, including isovalerylcarnitine and methylbutyrylcarnitine.

What the Results Mean

High levels of these compounds may indicate a metabolic disorder that requires further evaluation by a specialist. Low levels could suggest other conditions affecting carnitine transport or energy metabolism.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: This test is critical for diagnosing inherited metabolic disorders, such as isovaleric acidemia or methylmalonic acidemia, which can cause severe health complications if untreated. Early detection allows for timely interventions, including dietary adjustments or enzyme replacement therapies.

Short name

Carnitine Organic Acids Panel

Frequently asked questions

What causes elevated levels of these carnitine compounds?
Elevated levels may result from genetic disorders that disrupt fat metabolism, infections, or certain medications. If you notice unusual symptoms, discuss them with your doctor.
How often should this test be repeated?
Your provider will determine frequency based on your symptoms and diagnosis. Follow-up tests may be scheduled if your condition is monitored closely.
Can diet affect the results of this test?
Yes, certain diets (e.g., high-fat or protein-rich) may influence carnitine levels. Always inform your provider about recent dietary changes before interpreting results.
  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