SFI Health Acetyl L Carnitine 90c L Carnitine: Benefits, Uses, and Side Effects Lifespan Research Institute Stabilizing the enzyme in fish odor syndrome APTILLION PLUS Tablets are an advanced neuroprotective and antioxidant formulation designed to provide effective support for nerve health, neuropathic pain relief, and neuronal recovery. Formulated with PEA, Acetyl L Carnitine, Alpha Lipoic Acid, 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.