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 give IV Levocarnitine (Carnitor): Uses, Side Effects, Dosage & More GoodRx Understanding the Role of Carnitine in TPN and IDPN Therapy L Carnitine helps your body turn fat into usable energy and plays a role in recovery, endurance, and even fertility., Your body does make it, and oral supplements are effective but injectable Comprehensive Guide to L Carnitine L Tartrate, Methylcobalamin & Folic Acid Tablet Steris Healthcare Pvt Ltd Mumbai