I came across a headline this morning about the link between vitamin D deficiency and headaches, so I did a quick Google search on the subject. The first thing that caught my eye were two recent articles with opposite titles.
The first, an article from Health.com titled “Why a Vitamin D Deficiency May Explain Your Chronic Headaches”, was about a Finnish study that found that men with the lowest levels of vitamin D were more than twice as likely to have headaches at least once a week, compared to those with the highest levels. Chronic headaches were only reported by 9.6% of the men. But those men, on average, had lower vitamin D levels (38.3 nmol/L) than those without headaches (43.9 nmol/L). The research could only establish an association between the two health conditions, not a cause-and-effect relationship.
Our study, being one of the largest studies that have investigated the issue, supports the view that vitamin D may be beneficial in headache prevention.