Carnitine (free and total)

This is an important test used to help diagnose carnitine deficiency, particularly in babies and infants.

Venous blood
1 tests included
5 days turnaround



About Carnitine (free and total)

What is carnitine?

Carnitine can refer to L-carnitine, acetyl-L-carnitine and propionyl-L-carnitine. It has an important role in the transportation of long-chain fatty acids into mitochondria, which produce energy for the vast majority of cells in the body. L-carnitine is known as ‘free’ carnitine. In mitochondria, L-carnitine accepts an acetyl group from acetyl-Coenzyme A (CoA), to form acetyl-L-carnitine (acetylcarnitine) and free CoA, which is key for energy production in the Krebs cycle. Without this reaction and subsequent transport of acetyl-L-carnitine out of the mitochondria, build-up of acetyl-CoA results in increased use of carbohydrates for energy production, rather than fatty acids.

Carnitine deficiency can result in problems digesting fats, leading to symptoms including anaemia and low blood sugar. It can also lead to heart, or muscle problems.

Why take the test?

This test checks for the level of free carnitine and total carnitine in the blood. It is used for patients being treated for type-II diabetes, cancer, kidney disease or an enlarged heart. It can also be given to diagnose carnitine deficiency, particularly in babies and infants who may not be able to produce sufficient carnitine themselves.

What's tested

Amino Acids

How it works



Purchase your Kit

Just order a test online and get your kit delivered right to your door unless you are ordering a COVID-19 Fit to Fly test where you will be given appointment options to attend our clinics across the United Kingdom for a nose and throat swab PCR test at the checkout stage.



Take your test and post

Follow our simple instructions to take your sample and post back the enclosed prepaid envelope to our accredited lab for processing. We also offer home or workplace visits by a qualified nurse. For COVID-19 Fit to Fly tests you must attend one of our partner clinics for our trained collection officers to take your sample. You will then have the results emailed to you.



Get results directly to your dashboard

You will receive an email notification from our medical team when your results are available on your secure personalised health dashboard.