Margaret Durst discusses how taking the amino acid l-carnitine can lead to less fat, more muscle and sharper mental focus..L-carnitine is an amino acid that acts like a B vitamin. L-carnitine is made by the body from the amino acid l-lysine along with various vitamins and minerals. Its main function is to provide energy at the cellular level by transporting certain fatty acids to the cells.L-carnitine increases the use of fat for energy. This helps prevent fatty buildup, especially in the heart, liver and skeletal muscles. L-carnitine lessens the risk of heart disorders, inhibits fatty liver and reduces certain health risks of diabetes.There have been several, very positive studies on l-carnitine. These include reducing damage to the heart from heart surgery and reducing the pain caused by...