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Trimethylaminuria: Definition, symptoms, and more Trimethylaminuria (Fish Odor Syndrome or TMAU) Optimizing endurance performance in elite swimmers: effects of L carnitine supplementation and hydration strategies Applied Water Science Springer Nature Link 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.
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