Understanding the Role of Carnitine in TPN and IDPN Therapy L Carnitine vs L Arginine: Understanding Their Differences and Benefit Fitness Health Carnitine, Boost Your Energy, Weight Loss and Health Uses. What are the benefits of carnitine? Ask Huberman Lab L Carnitine: Benefits and Side Effects Review PDF Dietary Supplements Nutrition 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.