One of the most powerful “fat busters,” L-Carnitine aids in weight loss by preventing fat buildup. This strong amino acid also plays a key role in heart health, helping to lower triglycerides and strengthening the heart muscle itself. L-Carnitine increases your endurance and overall muscle strength, and can even enhance your athletic ability. In addition, L-Carnitine protects against liver disease and reduces your chance of getting many forms of heart disease. 60 Capsules.