L Carnitine Benefits for Fat Burning and How to Use ICONFIT L Carnitine 3000 San Nutrition 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 Liquid L Carnitine 3000 delivers a powerful blend of three forms of L Carnitine to support fat metabolism, endurance, and recovery. Each serving packs 3000 mg in a fast absorbing, no mixing required liquid that Nutrex Liquid L Carnitine 3000 Orange Mango Liquid L Carnitine 3000 Nutrex Amino Acids