L Carnitine Dosage Guide: How Much Should You Take? Does L Carnitine Work for Fat Loss? A Dietitian Explains How to Take L Carnitine Correctly to Boost Your Training Bodybuilding.com IV Carnitine Therapy Energy Boost & Metabolism Support Minnerva Clinic Still confused about L Carnitine? In this reel, he explains how Muscle Food L Carnitine works inside your body. A naturally occurring amino acid that helps convert stored fat into usable energy. Still confused about L Carnitine? , In this reel, he explains how Muscle Food L Carnitine works inside your body., A naturally occurring amino acid that helps convert stored fat into usable energy.