Carnitine is an amino acid-derived compound synthesized from lysine and methionine, naturally occurring in meat, fish, and dairy products. Its primary role involves transporting fatty acids into mitochondria, where they undergo oxidation for energy production. Beyond this function, carnitine participates in enzymatic processes that regulate lipid metabolism and cellular energy balance. It further contributes to mitochondrial efficiency through biochemical exchanges. Widely distributed in animal-based foods, carnitine plays a fundamental role in metabolic function and physiological equilibrium.