Carnitine Molecule of the Month September 2003 Can L Carnitine supplementation lead to liver dysfunction? Consensus L carnitine Could Be Beneficial in Nonalcoholic Fatty Liver Disease Patients by Improving Choline Metabolism and Reducing Liver Biomarkers European Medical Journal L Carnitine 500 mg Carnitine Protocol for Life Balance When to take L carnitine: Dosage, forms, and side effects Early research into L carnitine was often cited as underwhelming, showing negligible changes in muscle carnitine content and fat loss outcomes. However, these findings may have been limited by a short study window