Carnitine is biosynthesized from lysine. Therefore, it might be related to the energy production from branched-chain amino acids.
Carnitine is a quaternary amine that occurs naturally in many mammalian tissues. It exists in relatively high concentrations in skeletal muscle and heart, where it regulates basal metabolism. It shifts the glucose metabolic process from glycolysis to glycogen storage and improves the transportation of long-chain fats into the mitochondria, where they are oxidized for energy production