Kinetics of carnitine concentration after switching from oral administration to intravenous injection in hemodialysis patients L Carnitine Injectable Factor Health MD Injectable L Carnitine How It Works & What to Expect? L carnitine Injection TACOMA VET MEDICATIONS L Carnitine Injection Home Delivered 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