L carnitine 500 mg food supplement from vitaworld Carbamide Forte L Carnitine L Tartrate 1000 Mg Capsule 60 Uses, Side Effects, Dosage, Price Truemeds 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 MASS Nutrex Liquid Carnitine 3000 vs L Carnitine 1000mg (L Tartrate) No They're Not The Same ! Here's Why : L Carnitine Base (Found in the Liquid) The liquid version usually uses the Base