Malonylcarnitine in Serum/Plasma

Why Is This Test Done?

Your healthcare provider may order this test if you have symptoms or a family history suggestive of inherited metabolic disorders, such as carnitine palmitoyltransferase (CPT) deficiencies. It may also be used in newborn screening programs or to monitor certain genetic conditions affecting fat metabolism.

What Does a Result Mean?

Results are not typically provided as absolute numbers in this context, as reference ranges vary by lab and may not be standardized. Elevated levels may suggest abnormal fat metabolism, while very low levels could indicate deficiencies or enzyme dysfunction. Always discuss results with your doctor.

Sample Collection and Preparation

This test requires a blood sample drawn from a vein, usually in a clinic or lab setting. You may be asked to fast for a few hours before the test, depending on your provider’s instructions. The sample is processed into either serum or plasma for analysis.

Common Conditions Monitored

Malonylcarnitine testing is often part of a broader evaluation for metabolic disorders, including conditions like medium-chain acyl-CoA dehydrogenase (MCAD) deficiency or other carnitine transport or metabolic enzyme deficiencies. It may also be used in patients with unexplained muscle weakness, fatigue, or metabolic crises.