I am chronic daily cluster never a break. I have been 8 years no break maybe one week here or there. I have found that when I was going through perimenopause and during my cycle that I had longer headaches instead of 45 mins to an hour, I will go 4 to 6 hours during those hormone shifts. I tried to think, when I finally noticed it was a pattern, what am I doing different or what part of the d3 regimine might be more affected or depleting. Water, water, hydrate hydrate for sure during these shifts... that made a big difference. Anemia possibly?? during my cycle crossed my mind lower iron levels plus the hormone shifts d3 drops b drops... vitamins and supplements never seem to hurt and almost always help shorten my headache. Such a personal journey on this one because we all shift in different ways but we all do cycle one way or another. Maybe there should be a study for it.
I hope you find some relief in your research!
