L Carnitine Injections for Weight Loss Prescription Weight Loss, Inc. Burn Bundle MICC & L Carnitine Injections for Fat Burn & Energy Olympia Pharmacy L Carnitine Injections: A Clinical Guide for Practitioners National Medical Resources Inc L Carnitine Injection vs. Oral Supplements: Which is More Effective? Katalyst Wellness Injectable VS Liquid L Carnitine. Which is better? 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