Acetyl L Carnitine Supplement Boost Energy & Fat Burning When to take L carnitine: Dosage, forms, and side effects Acetyl L Carnitine 500mg Health Thru Nutrition Oxin Nutrition Acetyl L Carnitine (ALCAR) 500mg Capsules Oxin Nutrition Metabolic Maintenance Acetyl L Carnitine 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