L carnitine Could Be Beneficial in Nonalcoholic Fatty Liver Disease Patients by Improving Choline Metabolism and Reducing Liver Biomarkers European Medical Journal L Carnitine is an amino acid found in high concentrations in muscle, heart, and liver tissues. Inside the cells, L Carnitine transports fatty acids into the mitochondria for energy production (i.e., ATP) and reduces Carnitine palmitoyltransferase 1 facilitates fatty acid oxidation in a non cell autonomous manner: Cell Reports Carnitine: Genetic Variants Affecting Mitochondrial Energy and Health Comprehensive review of the expanding roles of the carnitine pool in metabolic physiology: beyond fatty acid oxidation Journal of Translational Medicine Springer Nature Link Carnitine, Acylcarnitines and Beta Oxidation