Carnitine Octanoyl Transferase Activity (Serum/Plasma)
This test measures the activity of an enzyme involved in fat metabolism. It helps assess how well your body can transport fatty acids into cells for energy production.
["This test may be used to evaluate metabolic function in conditions affecting fat metabolism or energy production."]
Key facts at a glance
- LOINC
- 53176-4
- Short code
- Octanoylcarn/C2 DBS-sRto
- Synonyms
- Octanoylcarn/C2 DBS-sRto
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- 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 linked to impaired fat metabolism, such as unexplained muscle weakness, fatigue, or metabolic disorders. It could also be part of a broader evaluation for genetic or inherited metabolic diseases.
What to Expect Before the Test
No special preparation is typically required. You may fast for 8–12 hours before the test if instructed, but always follow your provider’s specific instructions. Bring any medications you’re taking to your appointment.
What the Test Involves
A blood sample will be drawn from a vein in your arm. The sample is collected in a tube and sent to a lab for analysis. The test measures enzyme activity in your serum or plasma.
What the Results Mean
Results are reported as enzyme activity levels, which can help identify abnormalities in fat metabolism. Low or high levels may indicate underlying metabolic issues that need further evaluation.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Clinical Significance: This test is primarily used to diagnose or monitor conditions affecting carnitine metabolism, such as primary carnitine deficiency or certain inherited disorders. Abnormal results may prompt additional testing or referrals to specialists like metabolic experts or genetic counselors.
Short name
Carnitine Octanoyl Transferase Activity
Frequently asked questions
How often will I need this test?
What causes abnormal results?
Can I eat or drink anything before this test?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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