Acetyl L Carnitine 90c by Numedica Integrative Psychiatry 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 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 L carnitine ameliorates bile duct ligation induced liver fibrosis via reducing the nitrosative stress in experimental animals: preclinical evidences: Heliyon