GNC Acetyl L Carnitine alpha Lipoic Acid 500 mg 200 mg GNC Acetyl L Carnitine 500mg Capsules ALCAR Peak Supps UK 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: Superior Labs Acetyl L Carnitine 500 mg, High Potency ALCAR, Pure Non GMO, Zero Synthetic Additives, Maximum Absorption, Energy & Fat Metabolism, Brain, Nerve & Cellular Detox Support, (200 Veg Caps) : Everything