The Role of L Carnitine in Distance Athletes 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: NutraBio Acetyl L Carnitine (ALCAR) Supplement, 500mg Support Natural Energy Production, Metabolic Management, and Overall Health, 90 Capsules : Everything Else Fast&Up 3000mg L Carnitine For Fat Loss in India Fast&Up The adverse effects of long term l carnitine supplementation on liver and kidney function in rats L Liu, D M Zhang, M X Wang, C Y Fan, F Zhou, S J Wang, L D Kong, 2015 L Carnitine: The Energy Booster Your Body Loves Turn fat into fuel and power up your recovery with one of our favorite performance vitamins. Boosts metabolism & fat burning