Injectable L Carnitine: Does It Really Work for Fat Loss? CARNITOR (levocarnitine) Injection 1 g per 5 mL vial For Intravenous Use Only. Know About L Carnitine Injections for Weight Loss Injectable L Carnitine 500mg ml (20ml) : Amazon.ca: Health & Personal Care 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 Linus Pauling Institute Oregon State University