L-Carnitine is an important amino acid that can help transport fat to the muscle to be burned as energy. In promoting better utilization of body fat, it may aid in weight loss and improve athletic performance. Clinical research has also shown L-Carnitine supports athletic performance in endurance athletes. L-Carnitine plays a crucial role in cardiovascular metabolism and weight management. Whether you use L-Carnitine for the health of your heart, endurance, or fat loss, you can be sure you are getting quality with Optimum Nutrition's L-Carnitine.