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. Comprehensive review of the expanding roles of the carnitine pool in metabolic physiology: beyond fatty acid oxidation Journal of Translational Medicine Springer Nature Link Does L carnitine cause fishy body odor? Surprising Truth and Solutions Tonum L Carnitine: Benefits, Risks, and Its Role in Fitness and Weight Loss WellnessPulse L Carnitine: Benefits, side effects, and dosage