Ayuda la L CARNITINA a quemar grasa? Drasanvi 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. Trimethylaminuria: Definition, symptoms, and more L Carnitina, las 4 funciones en el metabolismo Fatro Trimethylamine N oxide (TMAO): Pathway, Cardiovascular Risk, Diet & LCMS MS Testing