Can choline supplementation cause a fishy body odor? Consensus TMAO: how gut microbiota contributes to heart failure Translational Research Treatments of trimethylaminuria: where we are and where we might be heading ScienceDirect The effect of egg yolk trimethylamine (TMA) concentration on fishy odor Download Scientific Diagram Breakthrough in studying the enzyme that ultimately produces fish odor syndrome EurekAlert! 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.