Carnitine is a naturally occurring compound that plays a crucial role in energy production within the body. It helps transport fatty acids into the mitochondria, the cell's powerhouse, where they are converted into energy. This process is essential for maintaining energy levels, especially during physical activity. Carnitine is found in various foods, particularly in animal products like meat and dairy. It can also be synthesized in the body from the amino acids lysine and methionine. Some people take carnitine supplements to enhance athletic performance or support weight loss, although research on its effectiveness is mixed.