肉毒碱是季铵，天然存在于大多数哺乳动物组织中。它在骨骼肌和心脏中参与能量代谢调控，浓度相对较高。它可将葡萄糖代谢由糖酵解转移至糖原储存，并促进长链脂肪酸向线粒体转运，使其在线粒体氧化产生能量。 Carnitine is a quaternary amine that occurs naturally in most mammalian tissue. It is present in relatively high concentrations in skeletal muscle and heart where it is involved in regulating energy metabolism. It shifts glucose metabolism from glycolysis to glycogen storage and enhances the transport of long chain fatty acids into the mitochondria where they are oxidized for energy production.