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. 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. L Carnitine CustomHealthCenters Trimethylaminuria (Fish Odor Syndrome or TMAU) L Carnitine Avoid Fishy Smell TikTok Does L carnitine cause fishy body odor? Surprising Truth and Solutions Tonum