Applied Nutrition L Carnitine 3000 Liquid L Carnitine with Green Tea & Vitamin C, Boosts Energy & Weight Management, Vegan (480ml 32 Servings) 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 Acetyl L Carnitine: Benefits and Side Effects Gene Food 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.