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 injection is recommended at 1 ampule every 2 3 days for best results. The L Carnitine is taken intravenously either by normal injection or using a butterfly needle. After taking this L Carnitine, you L Carnitine XS 4000, Apple Bomb, 15.72 fl oz (465 ml) Why Injectable Carnitine Outshines Oral The Ultimate Bodybuilding Advantage!