Carnitine Rich Foods: Understanding L Carnitine and Its Benefits Loyal 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 Ultra L carnitine making me reek of rotting fish for 48 hours #lcarnitine #fishy #smell #trauma #fyp Does Carnitine Cause Body Odor? Lume Deodorant L Carnitine500, 500 mg, 120 Capsules Is L Carnitine Safe? Watch FIRST BEFORE Taking L Carnitine Supplements