L Carnitine is often marketed as a fat burner, but most people dont realize that oral and injectable L Carnitine are not the same..Oral L Carnitine has poor absorption (only 20% bioavailability), Nutrabliss L Arginine L Citrulline Liquid 4000 mg SuperSmart Acetyl L Carnitine Arginate 1000mg per Day L Carnitine & L Arginine Complex ALCAR Supplement Non GMO 120 Vegetarian Capsules Carnitine Wikipedia Top L Carnitine Supplements GNC