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 Carnitine: Genetic Variants Affecting Mitochondrial Energy and Health Potential Adverse Effects of L Carnitine Marnys The Role of L Carnitine in Kidney Disease and Related Metabolic Dysfunctions Frontiers L carnitine prevents lenvatinib induced muscle toxicity without impairment of the anti angiogenic efficacy