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. Dietary supplementation of l carnitine ameliorates metabolic syndrome independent of trimethylamine N oxide produced by gut microbes in high fat diet induced obese mice Food & Function (RSC Publishing) Pharmacokinetics of L Carnitine Clinical Pharmacokinetics Springer Nature Link Trimethylaminuria: Definition, symptoms, and more L Carnitine: Benefits, Uses, and Side Effects Lifespan Research Institute Does Carnitine Cause Body Odor? Lume Deodorant