Acetyl L Carnitine vs L Carnitine: 4 Key Differences Momentous L Carnitine Injection Levocarnitine IV What is L Carnitine and what does it do? VPA Australia Vitacost Acetyl L Carnitine HCl 500 mg 120 Capsules 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 Supplements and chronic pain: What does the research say? Some studies suggest possible benefits for: Acetyl L Carnitine (energy for cells; studied in diabetic nerve pain) Alpha Lipoic Acid (antioxidant; may ease nerve pain,