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Lack of Sunshine Linked to Headaches

Because serum vitamin D levels are correlated with latitude (lower latitudes get more sunshine, higher latitudes get less), researchers searched for a relationship between headache prevalence rate and latitude. They found a significant relationship between tension-type headache and migraine as latitudes increased.

“The relation was more obvious for the lifetime prevalence for both migraine and tension-type headache,” they wrote in The Journal of Headache and Pain. “One year prevalence for migraine was also higher at higher latitude. There were limited studies on the seasonal variation of headache disorders. However, available data indicate increased frequency of headache attacks in autumn-winter and least attacks in summer. This profile of headache matches with the seasonal variations of serum vitamin D levels.”

The relationship requires more study to determine whether a lack of Vitamin D is a causal factor for migraine.

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