Does Carnitine Cause Body Odor? Lume Deodorant 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 L Carnitine injection is recommended at 1 ampule every 2 3 days for best results. The L Carnitine is taken intravenously either by normal injection or using a butterfly needle. After taking this L Carnitine, you