L Carnitine doesnt magically burn fat, it helps your body use fat as energy. Combine it with training and consistency, and youll feel the difference @Marybosch shows us how L Carnitine will boost L Carnitine Linus Pauling Institute Oregon State University When to Take L Carnitine for Optimal Training Benefits Transparent Labs 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. L carnitine: The Endurance Sports Nutrient Holland & Barrett