Riboflavin (vitamin B2) has been a popular supplement for the prevention of migraine headaches. The evidence for its efficacy is limited. Only one small double-blind, placebo-controlled trial showed that a very high dose of riboflavin (400 mg daily) is better than a placebo. The study included only 55 patients, which makes the results not very reliable. Besides, the difference between the riboflavin and the placebo groups appeared only in the third month. There was no difference during the first two months. This study was published over 20 years ago and my clinical impression over this long period of time has been fairly negative.
A study just published in the journal Headache examined dietary intake of riboflavin and thiamine (vitamin B1) and correlated it with the occurrence of migraines or severe headaches. The researchers used the data from 13,439 adult participants in the National Health and Nutrition Examination Survey conducted between 1999 and 2004 in the United States. They found that people with a high intake of thiamine were significantly less likely to suffer from severe headaches or migraines. This was more pronounced in women. They found no such association for riboflavin.
Supplements with the most evidence in treating migraines are magnesium and CoQ10. I recommend riboflavin, folate (vitamin B9) and vitamin B12, to patients with an elevated homocysteine level. Excessive amounts of this amino acid are damaging to blood vessels and may be responsible for the increased risk of strokes in patients who have migraine with aura. It is worth checking homocysteine levels in all patients who have migraine auras, even if the auras occur infrequently.
“B complex” is a popular combination of various B vitamins. This latest paper is making me consider adding B complex rather than individual B vitamins to magnesium and CoQ10 in all of my migraine patients.
