L Carnitine contents in foods (modified from [70]). Download Scientific Diagram Amazon.com: Nulo FreeStyle Adult Trim Dry Dog Food High Protein Grain Free Dog Food for Healthy Weight Management, Natural Kibble with Probiotics, L Carnitine and Fiber for Small, Medium, Large Breeds, 26lb 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 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 known as the energy nutrients, provides massive benefits to your heart and works best with Alpha Lipoic Acid.