Diese von der Regierung eines australischen Bundesstaats betriebene Website erläutert auf hervorragende Weise, warum Hypoglykämie und Insulin im Rahmen von Migräne eine Bedeutung spielen:
"According to some studies, what we eat and when we eat it plays a significant role in headache and migraine. Overactivity of the arteries in the head has been found to cause pain, and wildly fluctuating blood sugar levels can prompt these vessels to spasm in susceptible people. Caffeine, a compound commonly found in coffee, tea and chocolate, has been linked to headache. Researchers believe that people who are prone to headache and migraine may be sensitive to the effects of caffeine. Limiting drinks or foods containing caffeine is generally recommended. Food additives and naturally occurring food chemicals can also trigger headache in some people. If you suspect that your headaches may be linked to your diet, it is important to seek medical attention so that your sensitivities can be properly diagnosed.
Arteries are affected by insulin
Most cells in the body need to burn glucose with oxygen to produce energy. The digestive system breaks down the carbohydrates we eat into glucose. This simple sugar is then transported to each cell via the bloodstream. A gland of the endocrine system called the pancreas secretes a hormone called insulin, which helps the glucose to migrate from the blood into the cells. If the food eaten is absorbed quickly into the bloodstream, then the pancreas has to respond with a strong hit of insulin. The sudden drop in blood sugars seems to encourage the arteries in the head to constrict. During a migraine, visual disturbances such as the characteristic aura may be due to this arterial constriction.
Hypoglycaemia means low blood sugar
If you skip a meal, your blood sugar level may drop too low for your brain to function comfortably. In order to boost the amount of glucose to the brain, the body releases hormones which may also cause an increase in blood pressure because they narrow the arteries. This narrowing of the arteries can contribute to headache and migraine."