Does L Carnitine Work for Fat Loss? A Dietitian Explains 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. What's the Difference Between CLA and Carnitine? Revisiting the Role of Carnitine in Heart Disease Through the Lens of the Gut Microbiota CARNITINE (L CARNITINE, ACETYLCARNITINE) Neuroneeds