Injectable carnitine vs oral version comparison? Levocarnitine Injection: Package Insert Prescribing Info Injectable carnitine vs oral version comparison? ORAL VS. INJECTABLE L CARNITINE , Does it really matter which you use? , Both have pros and cons but it really comes down to what is going to be most suited to use as an individual athlete., L Carnitine Injection Home Delivered Injectable L carnitine vs oral? For me, absorption, fewer GI issues, & energy performance gains make injections the winner. #LCarnitine #Injectable #Bioavailability #MetabolicHealth #EnergyBoost