TMAU: Diet to reduce a fishy odour Dietitian's Life Get Rid of Fishy L Carnitine Smell: Essential Fixes Tonum 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 L Carnitine: Benefits, side effects, and dosage What does the smell of your urine tell you?? Does Carnitine Cause Body Odor? Lume Deodorant