L Theanine Vs L Carnitine: Can We Combine Them? Vinatura Supplements L Carnitine Linus Pauling Institute Oregon State University 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 l Carnitine Supplementation in Recovery after Exercise L Carnitine 60 Tablets Source Naturals L Proline L Lysine, 275 mg 120 Tablets Smith's Food and Drug