Thats interesting, I assume the more carbs the more likely / higher intensity headache. What mechanism do you think could be at play here?
I only recently was aware of this problem / carbohydrate intolerance.
1.5 year ago, my headache became worse, I switched to a low glucidic diet to see what would happen and I was quickly relieved.
One month ago I tried again to eat starches, because I was not in my home for three days and I had no alternative diet available....
I was not anxious to change my diet, I though a few days wouldn't be a problem. I was wrong!
The second day, I woke up with the strongest headache you can imagine...The third day I still ate starches as I had not make the correlation (the headache certainly prevented me to think!)...It's only the day fourth day that I understood what I had done wrong...
Now I'm investigating the possible cause and the first hypothesis seems to be brain insulin resistance.
Brain insulin resistance seems to be a rather trendy scientific hypothesis to explain a lot of neurologic diseases and intranasal insulin is currently trialed for alzheimer patients. (this allows insulin to reach the brain quickly)
The link between brain insulin resistance and headache may explain why Ginger root can relieve headache :
Ginger improves insulin sensitivity and some ginger components are able to penetrate the brain blood barrier.