Does Carnitine Cause Body Odor? Lume Deodorant Trimethylaminuria (Fish Odor Syndrome or TMAU) 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: Benefits, Uses, Side Effects, and More Body odour isnt just about deodorants or perfumes it starts from within. The food you eat plays a powerful role in balancing your bodys natural scent, keeping you fresh, confident and healthy. Try