Creatine Vs Carnitine: Which One Is Best For Me? PC Laboratories Creatine vs L Carnitine: Which Supplement Fits Your Goals? This combo is. L Carnitine helps your body use fat as fuel Creatine fuels strength, power, and performance A stronger, more efficient body! Educational purposes only. Not medical advice. Christine L Carnitine and Creatine are both game changers for fitness, but they each shine in different ways! SAVE this as your quick guide! L Carnitine, found in red meat, fish, and chicken, supports fat Creatine VS L Carnitine