What Is L Carnitine? How Could It Help With Weight Management? Wellness Hub L Carnitine: Benefits, Uses, Side Effects, and More Acetyl L Carnitine Allergy: Symptoms and Treatment Options (2026) Wyndly What's the Difference Between CLA and Carnitine? L Carnitine Dosage Explained: A Complete Guide The Science of Good Health Did You Know? Some people report a fishy smell after supplementing with L carnitine. This happens because certain gut bacteria convert carnitine to trimethylamine, a malodorous compound found in rotting fish.