As a follow-up post, I also take vitamins: in morning, 1000 mcg methylcobalamin B-12 and 200 mg high absorption chelated magnesium (every other day to reduce impact on gut); at lunch, 5000 IU vit D3 and a multivitamin for people over age 65; at night before bed, 5 mg melatonin (slow release). I've been taking these for about three years.
Do folks take other vitamins to prevent or lessen cluster headaches?