Lcarnitine for Fat Loss: Does it Work? Benefits, Warnings L Carnitine Injections for Weight Loss Prescription Weight Loss, Inc. L CARNITINE (LEVOCARNITINE) What is it? L Carnitine is a natural amino acid that helps the body turn fat into energy. How it works: Levocarnitine forces fat into the cells to Men's Why Use L Carnitine Convenient liquid shot for faster delivery into the blood stream Added Pantothenic Acid which works directly with carnitine to help convert macronutrients into energy. It's also great