When to take L carnitine: Dosage, forms, and side effects Is fish smelly? If you have ever caught fresh fish, you know that it doesn't have a particularly strong odor, maybe a hint of ocean water. But when fish are killed, bacteria What does L Carnitine taste like? (L Carnitine) L Carnitine Tartrate Does It Help Burn Fat? AS IT IS Nutrition 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