Carnitine: the claims and why it may not work 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 L carnitine tartrate supplementation in the fight against infectious disease Are L Carnitine and L Carnosine the Same? Anti Aging Systems Did you know L carnitine, a vital amino acid, is naturally produced by your body and found in various foods? While acetyl L carnitine (ALCAR) can be a beneficial supplement for some, most people get CoQ10 Plus with L Carnitine 100 mg Nature's Bounty