L Carnitine is not a magic fat burner It won't melt fat, build muscle, or replace hard work. The only thing it burns is your money Stick to the basics L Carnitine + Probio CLA 150G Injectable Fat Burner Vials Skini When to take L carnitine: Dosage, forms, and side effects Injectable L carnitine has real peer reviewed research behind it, but most people either oversell it or completely misunderstand it. Heres what 2 years of personal use plus the actual science says: L Carnitine Injection Levocarnitine IV The bright and the dark sides of L carnitine supplementation: a systematic review Journal of the International Society of Sports Nutrition Springer Nature Link