L Carnitine doesn't magically burn fat, it helps your body use fat as energy. Combine it with training and consistency, and you'll feel the difference @Marybosch shows us how L Carnitine will boost your Meet L Carnitine a naturally occurring amino acid that plays a key role in helping the body convert fat into usable energy. It works by transporting fatty acids into your cells to Complete Guide to Acetyl L Carnitine (ALCAR) Uses, Benefits & FAQs L Carnitine and Weight Loss: Does This Fat Burner Really Work? Health Guide Didn't another study show carnitine was good for the heart?