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 Benefits of Acetyl L Carnitine Simply Supplements L Carnitine Linus Pauling Institute Oregon State University Carnitine plays crucial role in energy production esp for the heart, fueling mitochondria (cell furnaces). Highest food source? Only animal food, especially red meat; lamb and beef are best. (Redder the Should I Take Acetyl L Carnitine or L Carnitine HealthAid