Acetyl L Carnitine is more thought of as a fat burner. It's actually powerful tool for athletes looking to improve endurance, energy, and mental performance. Here's how you can integrate it into your routine for Acetyl L Carnitine Amazon.com: Natural Factors, Acetyl L Carnitine 500 mg, Promotes a Healthy Memory, Concentration and Brain Function, 120 capsules (60 servings) : Everything Else Acetyl L carnitine physical chemical, metabolic, and therapeutic properties: relevance for its mode of action in Alzheimer's disease and geriatric depression Molecular Psychiatry