Carnitine The Meno Clinic Center for Advanced Medicine What is the recommended Lcarnitine dosage for children (mg per kilogram per day)? Supplements don't replace the workbut they can support it L Carnitine helps your body turn fat into usable energy, so you can push harder and recover better. Consistency first. Supplements second. Results Amazon.com: Acetyl L Carnitine 1,000mg Per Serving, 150 Capsules (ALCAR for Brain Function Support, Memory, Attention, and Stamina) Acetyl L Carnitine that is Third Party Tested by Double Wood : Everything Else