Gen Tec Nutrition Acetyl L Carnitine Australian Muscle 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 Amazon.com: BIOTICS RESEARCH Acetyl L Carnitine Athletic Strength, Neuroprotection, Boost Energy, Post Workout Muscle Recovery, Healthy Body Composition, Age Gracefully, Brain Health, Metabolic Support 90 Caps : Health & Household Acetyl L Carnitine, 500 mg, 120 Vegetarian Capsules Acetyl L Carnitine (100 Capsules) (One Time Order)