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 Role of Carnitine Shuttle System in the Active Transport of Fatty Acyl Coa into the mitochondrial The role of L carnitine in fatty acid metabolism in mitochondria (Wang Download Scientific Diagram Carnitine Acyl carnitine Carrier Encyclopedia MDPI Understanding the Benefits and Uses of Carnitine in Health and Fitness Fitness Health