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 Benefits of L Carnitine for PCOS Landys Chemist L Carnitine Side Effects & Safety: A Complete Guide The Science of Good Health L Carnitine Side Effects & Risks What Is Carnitine and Why Is It Important? The Amino Company The Role of l Carnitine in Mitochondria, Prevention of Metabolic Inflexibility and Disease Initiation