Best Time to Take L Carnitine: A Complete Guide The Science of Good 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 Top 5 Benefits of CoQ10 and L Carnitine Combination for Athletes iThrive Essentials MuscleBlaze Liquid L Carnitine 1100 Mg L Carnitine helps your body turn fat into fuel improving energy, endurance, and recovery. Combine it with consistent training and a clean diet for real results! , ., ., ., ., #LCarnitine #FatLoss Amazon.com: NOW Foods Supplements, L Carnitine 1,000 mg, Purest Form, Amino Acid, Fitness Support*, 100 Tablets : Health & Household