3 Carnitine shuttle for transport of activated fatty acid into Download Scientific Diagram Role of L carnitine in Cardiovascular Health: Literature Review Cureus Understanding the Benefits and Uses of Carnitine in Health and Fitness Fitness Health L carnitine is primarily synthesized in the liver from the amino acids lysine and methionine through a series of four enzymatic reactions, with the liver and kidneys converting the precursor butyrobetaine into active