Fish odour syndrome CMAJ L Carnitine: Everything You Need to Know Get Rid of Fishy L Carnitine Smell: Essential Fixes Tonum Optimizing endurance performance in elite swimmers: effects of L carnitine supplementation and hydration strategies Applied Water Science Springer Nature Link Product Spotlight: L Carnitine Coastal Pharmacy & Wellness 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