L Carnitine Benefits, Uses, Dosage, Foods, Side Effects Dr. Axe Carnitine The Nourishing Autism Collective L Carnitine Linus Pauling Institute Oregon State University 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 Frontiers Age and APOE affect L carnitine system metabolites in the brain in the APOE TR model Clinical Effects of L Carnitine Supplementation on Physical Performance in Healthy Subjects, the Key to Success in Rehabilitation: A Systematic Review and Meta Analysis from the Rehabilitation Point of View