L Carnitine for Fat Loss: Why Most Supplements Fail (and What Actually PEScience Does L Carnitine Work Without Dieting? Benefits, Fat Loss & Results 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 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