Frontiers Publishing Partnerships The role of acetylation in obesity induced cardiac metabolic alterations L Carnitine Optimum Nutrition: , OPTIMUM NUTRITION L CARNITINE 500 OZON Carnitine: the claims and why it may not work 500 MG OF PURE L CARNITINE, L carnitine is synthesized from the essential amino acids lysine and methionine. Because approximately 98% of the body'S L carnitine supply is found in muscle mass, and the