Acetyl L Carnitine and Erectile Dysfunction: What the Evidence Shows 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 L Carnitine500, 500 mg, 120 Capsules Does Carnitine Cause Body Odor? Lume Deodorant L carnitine 300 mg mL Syrup ( L Carnitine ) 30 mL Re3aya Pharmacy