L Carnitine, 500 mg, 60 Vegetarian Capsules 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 A Review of Benefits, Side Effects, and Dosage L Carnitine: Benefits, Uses, and Side Effects Lifespan Research Institute Does Carnitine Cause Body Odor? Lume Deodorant Does Carnitine Cause Body Odor? Lume Deodorant