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 Role of L carnitine in exercise training: Anti inflammatory, antioxidant, and metabolic interactions ScienceDirect L Carnitine with Apple Cider Vinegar L Carnitine Liquid 1500 mg for Energy & Muscle Support Carbamide Forte L Carnitine for Cutting vs Bulking: How It Works in Both Phases