Is L-carnitine effective?

L-carnitine, as a nutritional supplement, primarily functions to facilitate the transport of fatty acids into the mitochondria for oxidation and breakdown, thereby generating energy. This effect theoretically aids in weight loss, although actual results may vary among individuals and must be combined with appropriate exercise and dietary control. Additionally, L-carnitine is not suitable for everyone, particularly for individuals with heart disease or impaired liver or kidney function, who should avoid its use. It may play a role in weight loss, enhancing muscle strength, antioxidant activity, lowering cholesterol, and improving cardiac function. However, optimal effects require combination with physical activity and a balanced diet, and excessive or long-term use may lead to side effects. Before considering the use of L-carnitine supplements, it is recommended to consult a physician.