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 Levocarnitine (Carnitor): Uses, Side Effects, Dosage & More GoodRx L Carnitine injection is recommended at 1 ampule every 2 3 days for best results. The L Carnitine is taken intravenously either by normal injection or using a butterfly needle. After taking this L Carnitine, you MyProtein N Acetyl L Carnitine 250g 500g Ultimate Fitness 4u