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L Carnitine Side Effects: What's Real (2026) Why does L Carnitine cause a fishy smell? How Do You Stop Fishy Body Odor from L Carnitine? Inciteful Med Resources Trimethylaminuria (Fish Odor Syndrome or TMAU) L carnitine supplements can cause a fishy odor in the breath, sweat, and urine. This is likely due to the formation of trimethylamine (TMA). TMA is also responsible for the pungent smell of Need a faster way to support energy, metabolism, and mental clarity? Our intramuscular (IM) injections deliver targeted nutrients directly into the muscle for efficient absorption and cellular support. Four targeted options are
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