Carnitine Deficiency: What Is It, Causes, Symptoms, and More Osmosis 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 6 Healthy Foods High in L Carnitine Source Naturals L Carnitine Capsules 500mg, 120 ct Smith's Food and Drug What Is L Carnitine? A Complete Beginner's Guide to Benefits, Sources, Levocarnitine, commonly known as L Carnitine, is a naturally occurring compound that the body produces from the amino acids lysine and methionine. It plays a critical role in energy production by transporting fatty