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: Benefits, Side Effects, And Dosage, Per Dietitians When To Take L Carnitine to Maximise Your Shredding and Beyond BSc Supplements Shapen You Sleep Time Fat Burner With L Carnitine For Weight Loss and Melatonin For Deep Sleep and Stress Relief, Green Tea Extract, 60 Veg Tablets for Men and Women, Belly and How L Carnitine Helps with Fat Metabolism