Early research into L carnitine was often cited as underwhelming, showing negligible changes in muscle carnitine content and fat loss outcomes. However, these findings may have been limited by a short study window Compounded Carnitine (L) Injection Empower Pharmacy Pharmacokinetics of L Carnitine Clinical Pharmacokinetics Springer Nature Link L Carnitine Body Contouring Institute BCN Mesotherapy Serum Dermishop CARNITOR (levocarnitine) Injection 1 g per 5 mL vial For Intravenous Use Only.