The Right Way to Take L Carnitine to Boost Your Training If you're putting in the work but the scale isn't moving, your body might just need a little help tapping into its fat stores. That's where L Carnitine comes in. It's not a Amazon.com: ProSupps L Carnitine Liquid 3000, Stimulant Free Liquid Shots for Men & Women Clean Workout Drink for Energy, Performance & Muscle Recovery No Sugar, No Carbs 31 Servings, Blue Razz : 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.