L carnitine is an amino acid that is produced in your body that helps the body turn fat into energy. Carnitine is found in nearly all cells of the body and researchers have L Carnitine Boost: Does It Work? Navo L Carnitine Why You Work Harder and Still Have Fat L Carnitine Linus Pauling Institute Oregon State University L carnitine known as the energy nutrients, provides massive benefits to your heart and works best with Alpha Lipoic Acid.