L Carnitine Side Effects & Safety: A Complete Guide The Science of Good Health 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. l carnitine: Nutrition, pathology, and health benefits ScienceDirect Carnitine HealthyPlace How L Carnitine Supports Insulin Resistance Management Oana Posts L carnitine known as the energy nutrients, provides massive benefits to your heart and works best with Alpha Lipoic Acid.