What is Carnitine?

Carnitine is a naturally occurring amino acid that is produced in the liver and the kidneys from the amino acids lysine and methionine. This substance can also be obtained from foods such as meat and dairy. Carnitine occurs in two forms, known as D and L, but only L-Carnitine is active in the body.

L-Carnitine is available in different forms of supplementation, including Acetyl-L-Carnitine and L-Carnitine L-Tartrate.

Acetyl-L-Carnitine, also known as ALCAR, is composed of a carnitine molecule bound to an acetyl group and has potential neurological effects because it is able to cross the blood-brain barrier in humans.

L-Carnitine L-Tartrate (LCLT) is a L-Carnitine salt bound to tartaric acid and is mainly used for physical performance.

Scientific studies report that Carnitine:

  • Increases fatty acid oxidation.
  • Provides an ergogenic effect.
  • Delays fatigue onset.


Sung, D. J. et al. (2016). Role of l-carnitine in sports performance: Focus on ergogenic aid and antioxidant. Science & Sports 31: 177-188.

This website uses cookies to improve your browsing experience and for statistical purposes. By visiting us, you're agreeing to its use. For more information on the cookies used, how to manage or deactivate them in this device, please click here.