What is carnitine blood test for?

Evaluation of carnitine in serum, plasma, and urine is a biochemical screening test for suspected primary disorders of the carnitine cycle or secondary disturbances in carnitine levels as a result of organic acidemias and fatty acid oxidation disorders.

Is there a blood test for L-carnitine?

This test measures the amount of a substance called carnitine in your blood. It looks at how much usable or “free” carnitine you have. It compares that with the total amount in your blood. Carnitine is a compound that’s present in nearly every part of your body.

How do you test for L-carnitine deficiency?

These include:

  1. Blood tests. These are done to check the levels of carnitine in the blood.
  2. Urine test. This test looks for a protein called ketones.
  3. Exercise tests. These help identify the type of metabolic problem.
  4. Genetic test. This kind of test can confirm primary carnitine deficiency.
  5. Heart tests.

What does a high carnitine level mean?

High levels of free carnitine can indicate that your child has carnitine palmitoyl transferase type I (CPT-I) deficiency. A positive result does not mean your baby has CPT-I deficiency, but more testing is needed to know for sure.

What does low carnitine levels mean?

Collapse Section. Primary carnitine deficiency is a condition that prevents the body from using certain fats for energy, particularly during periods without food (fasting). Carnitine, a natural substance acquired mostly through the diet, is used by cells to process fats and produce energy.

What causes low carnitine levels?

What causes carnitine deficiency? Carnitine deficiency may occur in response to a genetic mutation (gene defect) in the protein responsible for bringing carnitine into the cell (primary carnitine deficiency), or it may occur secondary to other metabolic diseases (secondary carnitine deficiency).

What is the carnitine level?

Carnitine levels can be deficient in either blood or tissue (usually muscle) or both. The normal blood levels in humans are 50–60 μmol/L for total carnitine and 40–50 μmol for free carnitine. Carnitine blood levels are readily available from many commercial laboratories.

What are normal carnitine levels?

What causes carnitine deficiency?

What should your carnitine level be?

Reference Range

Age Range Serum Free Carnitine (µmol/L) Serum Total Carnitine (µmol/L)
Adolescent male 39.6±9.3* 53.5±10.5*
Adult female 19.3-53.9** 28.1-66.4**
Adult male 38.8-69.5 44.2-79.3
*Mean ± standard deviation (SD) **95% confidence interval (CI)

What causes low L-carnitine levels?

What is a normal carnitine level?