Potential Adverse Effects of L Carnitine Marnys L Carnitine vs Fat Burner Which Is For You? L Carnitine Before or After Workout Which Is Better for Fat Loss ? 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 doesnt magically burn fat, it helps your body use fat as energy. Combine it with training and consistency, and youll feel the difference @Marybosch shows us how L Carnitine will boost