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 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 Injectable carnitine in 2 minutes., What it is, How it works, Why some athletes use it, Most people focus on add ons before mastering the basics. Nutrition quality, total calories, training, and sleep L Carnitine Injection Clinica IDEAL Harwin L Carnitine Injections