Does Carnitine Cause Body Odor? Lume Deodorant 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 iSatori Liquid L Carnitine LS3 3000 L Carnitine Liquid 3000mg 16 oz L Carnitine Citrus Flavour Now Foods Canada Gorilla Mode AR L Carnitine Gorilla Mind