Role of carnitine in disease Nutrition & Metabolism Springer Nature Link Carnitine: the claims and why it may not work Medium chain fatty acid oxidation is independent of l carnitine in liver and kidney but not in heart and skeletal muscle American Journal of Physiology Gastrointestinal and Liver Physiology American Physiological Society L carnitine is an amino acid derivative that plays a crucial role in the body's energy production processes. As an injectable supplement, L carnitine has been employed to support various health conditions, including heart Liquid L Carnitine Energy, Metabolism & Fat Burning