If you are looking to get lean, then this is the amino acid you need. L-carnitine transfers long-chain fatty acids, such as triglycerides into mitochondria, where they may be oxidized to produce energy. Carnitine has also been shown to reduce fatigue and serve as an appetite suppressant as well. Therefore, l-carnitine would be a major asset to have in your arsenal when you are dieting. It not only will help keep your body from storing fat, but it will increase your aerobic capacity to help you burn more calories.
L-carnitine is also a great weapon for hardgainers looking to pack on muscle. Supplementing with l-carnitine can help you increase your strength and heavier weights mean bigger muscles in the long run.