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 Beneficial effects of l carnitine supplementation for weight management in overweight and obese adults: An updated systematic review and dose response meta analysis of randomized controlled trials ScienceDirect Amazon.com: Muscle Pharm L Carnitine 3000, The Ultimate Liquid L Carnitine Supplement for High Performance, Supports Metabolism, Hydration & Energy, Zero Sugar, Low Calories, Sour Cherry Flavor, 32 Servings : Everything Else Injectable L Carnitine How It Works & What to Expect? Why should I take L Carnitine?