Ingredient Spotlight: L Carnitine Source: Biosynthesised in the body from the amino acids Lysine and Methionine, L Carnitine is a conditionally essential nutrient involved in energy metabolism and fat transport. Key Benefits L Carnitine in Mitochondria Encyclopedia MDPI Acetyl L Carnitine Best Acetyl L Carnitine Supplements 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 increases muscle mass, reduces fat mass. Bangkok Hospital Headquarter