L Carnitine Injection Levocarnitine IV Does Carnitine Cause Body Odor? Lume Deodorant L Carnitine Side Effects & Safety: A Complete Guide The Science of Good Health L Carnitine: Benefits, Uses, and Side Effects Lifespan Research Institute 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 Amazon.com: Nutricost Acetyl L Carnitine (ALCAR) 500mg, 180 Capsules, 180 Servings Non GMO and Gluten Free, 1 Capsule per Serving : Everything Else