Product Spotlight! L Carnitine injections infusions and the benefits thereof! Compounded Carnitine (L) Injection Empower Pharmacy CARNITOR Levocarnitine Injection (L Carnitine) 200 mg mL, Single Dose Vial 5 mL, 5 Tray Injectable carnitine vs oral version comparison? L Carnitine is often marketed as a fat burner, but most people dont realize that oral and injectable L Carnitine are not the same..Oral L Carnitine has poor absorption (only 20% bioavailability), Injectable L Carnitine: Does It Really Work for Fat Loss?