Carnitine C7H15NO3 CID 10917 PubChem Acetyl L Carnitine VS L Carnitine: Which is Better? 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. Generation of acetylcarnitine from l carnitine occurs via carnitine Download Scientific Diagram How Acetyl L Carnitine Works HowStuffWorks