Carnitine C7H15NO3 CID 10917 PubChem 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 Carnitine and Erectile Dysfunction: What the Evidence Shows for Everyday Use Amazon.com: Nutricost Acetyl L Carnitine (ALCAR) 500mg, 180 Capsules, 180 Servings Non GMO and Gluten Free, 1 Capsule per Serving : Everything Else Acetyl L Carnitine and Lipoic Acid Erectile Dysfunction NIH Stabilizing the enzyme in fish odor syndrome