Carnitine Blend Rootcology L Carnitine: What it's used for, benefits and how to take it correctly Justloading 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. Does Carnitine Cause Body Odor? Lume Deodorant L Carnitine Injections: Before and After Results Carnitine Deficiency: What Is It, Causes, Symptoms, and More Osmosis