Mo Farah: Doctor says L carnitine injection not recorded correctly BBC Sport Athletes are injecting WHAT? WHERE? If anything was to come to the surface, we would look at it and see if it is doping related, Wada director general Olivier Niggli said at Injectable l carnitine has 100% bioavailability and its a supplement, not steroid., Even as a natty you can use and it can also help you in your bulking process, not just in fat loss. , ., Baaki if L Carnitine Peptide 400 mg L Carnitine Injection Levocarnitine IV Injectable L Carnitine: Does It Really Work for Fat Loss?