L carnitine is a compound that plays a crucial role in the metabolism of fatty acids. It helps transport long chain fatty acids into the mitochondria of cells, where they can be oxidized and used as a L Carnitine: Benefits, Side Effects, FAQ, Sources, and Dosage Carnitine metabolic disorders and novel clinical approaches: Mechanistic insights from deficiency management to liver and kidney disease treatment ScienceDirect L Carnitine plays an important role in the larger metabolism equation: helping your body use fat efficiently as fuel. Learn more about the science on this week's post on The Wellness Edit.