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: Benevolent L Carnitine Supplement High Potency 1500mg L Carnitine Tartrate Fast Absorbing, Convert Fat to Energy, Support Lean Muscle, Boost Workout Performance & Metabolism 120 Vegan Capsules : Health & Household L Carnitine 3000 Liquid Nature's Lab CoQ10 200 mg + Alpha Lipoic Acid + Acetyl L Carnitine, 120 Vegetarian Capsules Costco VitaThrive Acetyl L Carnitine 500mg 90 Capsules