L Carnitine Powder Amino Acid Supplement Powder GNC Total Lean L Carnitine 1000 mg 60 Tablets GNC L Carnitine Benefits for Fat Burning and How to Use ICONFIT Injectable L Carnitine: What It Is, How It Works, and Who Should Use It Mesotherapy Cocktails, Exosomes Regenerative Skin Boosters Liquid L Carnitine 3000 Nutrex Amino Acids 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