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, Actyl L Carnitine Therascience L Carnitine Dosage for Erectile Dysfunction: What the Evidence Shows and How to Use It Safely Acetyl L Carnitine Dosage for Erectile Dysfunction Metabolic Optimizer L Carnitine supports cellular energy production. Acetyl L Carnitine Dosage for Erectile Dysfunction: What Actually Works