Liquid EVO L Carnitine 3000 HSN Sportseries Does L carnitine cause fishy body odor? Surprising Truth and Solutions Tonum Does L carnitine cause fishy body odor? Surprising Truth and Solutions Tonum L Carnitine: Benefits, Uses, and Side Effects Lifespan Research Institute 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. Do you or someone you love smell like fish? It could be Fish Odor Syndrome! #fishodorsyndrome #fishy #fishysmell #fishodor