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 Can L Carnitine Fumarate Support Energy Levels for Long COVID and ME CFS Patients? RTHM Creatine & Acetyl L Carnitine Energy Plus Life Extension Europe L Carnitine, 500 mg Veggie Capsules Jarrow Formulas Acetyl L Carnitine Arginate 500 mg Combination of Carnitine & L Arginine Benefits