A recent study investigated a relationship between diet quality and dietary patterns (Mediterranean or DASH diet) and migraine symptoms. It turned out that people aged 18–64 had more frequent and more severe symptoms of migraine when they ate a poor quality diet or a diet, that did not adhere to the Mediterranean or DASH pattern. And vice versa, a diet high in vegetables, fruits, legumes, and oil seeds, as well as the DASH and Mediterranean dietary patterns were linked to lower migraine attack severity.
By the way, for those, who are not familiar with the DASH diet. DASH stands for a Dietary Approaches to Stop Hypertension. You can see this diet as a variation of the Mediterranean diet with the only difference that the Mediterranean diet promotes more fish and less dairy (although fat-free or low-fat) than the DASH diet.
Curious? HERE is the source