What Are L Carnitine Injections Used For? L Carnitine and L Arginine Tablets Manufacturer and Supplier in India Understanding the Benefits and Uses of Carnitine in Health and Fitness Fitness Health 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: The Energy Booster Your Body Loves Turn fat into fuel and power up your recovery with one of our favorite performance vitamins. Boosts metabolism & fat burning L Carnitine Benefits, Uses, Dosage, Foods, Side Effects Dr. Axe