Effect of dietary L carnitine on mass activity of spermatozoa (%) (mean Download Table What is L Carnitine? L Carnitine is a naturally occurring amino acid derivative that the human body can synthesize itself. It is mainly found in red meat and dairy products. [1] Core Benefits of L Carnitine is a naturally occurring compound that helps your body turn fat into energy by transporting fatty acids into the mitochondriayour body's powerhouses. More energy means stronger performance, better fat burning, and Carnitine Wikipedia The effects of L carnitine supplementation on lipid profiles in adults: A systematic review and dose response meta analysis ScienceDirect