Does L carnitine cause fishy body odor? Surprising Truth and Solutions Tonum How can L Carnitine help in your Journey of Wellness? Osoaa Stinky People, Odor Sensitivities & Ammonia Toxicity FUNCTIONAL MEDICINE, SIBO & IBS DR HOUSTON ANDERSON 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. The Right Way to Take L Carnitine to Boost Your Training 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.