L Carnitine: 3 Ways Physique Pros Use This Fat to Fuel Powerhouse SteelFit USA Lets talk about L Carnitine, If youre in the gym community, youve probably heard of L Carnitine but what actually is it?, L Carnitine is a naturally occurring compound that plays a role in helping L Carnitine L Tartrate: 8 Key Benefits Dr. Lam 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.,