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Carnitine Deficiency: What Is It, Causes, Symptoms, and More Osmosis Carnitine: the claims and why it may not work 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. Can L Carnitine Cause Side Effects? Truth vs Myths Explained (2026 Guide)
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