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 Liquid Allmax Nutrition Allmax Nutrition L Carnitine ELITE BURN L Carnitine Supplements L Carnitine Amino Acid Myprotein UK Did You Know? Some people report a fishy smell after supplementing with L carnitine. This happens because certain gut bacteria convert carnitine to trimethylamine, a malodorous compound found in rotting fish.