How to Take L Carnitine Liquid: Complete Guide The Science of Good Health L Carnitine is not a magic fat burner It won't melt fat, build muscle, or replace hard work. The only thing it burns is your money Stick to the basics L carnitine Fat Burning Timeline Effects in 412 Weeks Tonum Complete Guide to Acetyl L Carnitine (ALCAR) Uses, Benefits & FAQs 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