Vitamins to be taken away from thyroid medication What Is L Carnitine? How Could It Help With Weight Management? Wellness Hub L Carnitine: What it's used for, benefits and how to take it correctly Justloading 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. Carnitine, Boost Your Energy, Weight Loss and Health Uses.