Max Muscle Max Liquid L Carnitine 3500MG 32Serv. 480Ml Fruit Punch Maxmuscle Elite Didn't another study show carnitine was good for the heart? L carnitine Liquid Energy Support for Workout Performance L carnitine is effective for both fat loss and athletic performance. However, oral L carnitine has lower bioavailability and can be harmful at high doses, so it should be avoided. , Even cardiologists