Acetyl L Carnitine (100 Capsules) (One Time Order) Your body already makes L Carnitine, so why do people take it as a supplement? Because while it helps burn fat for energy, it only works when paired with the right lifestyle., So before you jump on GNC Acetyl L Carnitine Alpha Lipoic Acid: Mood Support Supplement GNC 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