Condition / Purpose Typical Dose Range Notes Alzheimer’s Disease (AD) 300–600 mg/day Used in clinical trials (e.g., 300 mg twice daily) Diabetic Neuropathy 300–600 mg/day Most common clinical application General Cognitive Support 150–300 mg/day Lower end for maintenance High-dose experimental use 900–1,200 mg/day Occasionally used under supervision in research