Fat Loss Bundle How Fast Does L Carnitine Work? Real Results Guide LABRADA INDIA 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 Turn sweat into progress with Nutrex L Carnitine 3000 480ml Made to support fat metabolism, energy production, endurance, and performance during your cut phase. With 3000mg L Carnitine, 31 servings, and 4 L Carnitine 3000 endurance