I just wanted to thank Dr. Wright for his research on Niacinamide. I suffered from primary headache symptoms for over a year.  Very frustrating.  Felt like my head was going to explode after sneezing or coughing with symptoms subsiding after 30 minutes.  Symptoms were more acute as the day progressed into the evening.  I opted for his recommended 3x1000mg=3000mg per day instead of the customary regimen of anti-inflammatory drugs.  Completely free of symptoms after three months.  I will continue with maintenance doses as needed. Very truly yours,

Dean, age 69 years