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 Does Carnitine Cause Body Odor? Lume Deodorant How to Take L Carnitine Liquid: Complete Guide The Science of Good Health L Carnitine (Orange) Outlastlabz Stabilizing the enzyme in fish odor syndrome L Carnitine500, 500 mg, 120 Capsules