L Carnitine: Uses, Benefits, Dosage, and Side Effects StrengthLog Does L carnitine cause fishy body odor? Surprising Truth and Solutions Tonum Nature's Truth L Carnitine 1000mg 60 Capsules : Target L carnitine what it is, properties, effects on weight loss + opinions 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