The Right Way to Take L Carnitine to Boost Your Training Benefits of Acetyl L Carnitine Simply Supplements L Carnitine Linus Pauling Institute Oregon State University Understanding the Role of Carnitine in TPN and IDPN Therapy 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.