L Carnitine Linus Pauling Institute Oregon State University 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 The Role of L Carnitine in Kidney Disease and Related Metabolic Dysfunctions Urine Smells Like Ammonia? What It Means Happy V L Carnitine Fumarate Olympian Labs Current state of the treatment landscape of phenylketonuria Orphanet Journal of Rare Diseases Springer Nature Link