Liquid L Carnitine Energy, Metabolism & Fat Burning L Carnitine Jarrow Formulas Energy L Carnitine Tartrate 500 mg 100 Capsules Vitacost Frontiers Role of Carnitine in Non alcoholic Fatty Liver Disease and Other Related Diseases: An Update 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