Malodorous biogenic amines in Escherichia coli caused urinary tract infections in womena metabolomics approach Scientific Reports 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. Correlation between the trimethylamine (TMA) concentration and the Download Scientific Diagram A recurring fishy odor could indicate a larger medical problem.