How Much L Carnitine Should I Take? A Guide The Science of Good Health Does Carnitine Cause Body Odor? Lume Deodorant L Carnitine Side Effects & Safety: A Complete Guide The Science of Good Health Stabilizing the enzyme in fish odor syndrome 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