Carnitine: the claims and why it may not work L Carnitine Benefits of L Carnitine for PCOS Landys Chemist L carnitine known as the energy nutrients, provides massive benefits to your heart and works best with Alpha Lipoic Acid. Carnitine HealthyPlace If you are like a lot of people, you may have never heard of carnitine but this important nutrient is critical for our body's ability to optimally burn fat required for energy.