iSatori Liquid L Carnitine LS3 3000 Benefits of Acetyl L Carnitine Simply Supplements IV Carnitine Therapy Energy Boost & Metabolism Support Minnerva Clinic CARNITOR (levocarnitine) Oral Solution (1 g per 10 mL multidose) 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