What Is CoQ10 and L Carnitine, and How Can It Change Your Life? iThrive Essentials 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. New study links L carnitine in red meat to heart disease Harvard Health ByBv's Scoop of Knowledge Scoop 1: L Carnitine Better Knowledge Better Choices Better Version L Carnitine plays a crucial role in energy production by facilitating the conversion of fat into Carnitine Deficiency: What Is It, Causes, Symptoms, and More Osmosis L Carnitine Benefits, Uses, Dosage, Foods, Side Effects Dr. Axe