Does Carnitine Cause Body Odor? Lume Deodorant L Carnitine: Benefits, Uses, and Side Effects Lifespan Research Institute L Carnitine Promix Nutrition 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 Acetyl L Carnitine 500 mg 90 Caps by Klaire Labs SFI Health