Do you or someone you love smell like fish? It could be Fish Odor Syndrome! #fishodorsyndrome #fishy #fishysmell #fishodor 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. Comparison of short term and long term effects of peroral L carnitine intake: clinical implications of elevated TMAO levels in cardiovascular complications Carnitine Deficiency: What Is It, Causes, Symptoms, and More Osmosis Treatments of trimethylaminuria: where we are and where we might be heading ScienceDirect TMAO: how gut microbiota contributes to heart failure Translational Research