Migraine is a primary headache disorder characterized by throbbing pain (often one-sided), moderate to severe intensity, accompanied by nausea, light sensitivity, and sound sensitivity. Chronic migraine (CM) is defined as 15 or more headache days per month for at least 3 months, with at least 8 days meeting migraine criteria. It affects 2–3% of the global population (roughly 1.5 million people in Italy) and is significantly more common in women (3:1 ratio compared to men). Migraine triggers are stimuli that, in susceptible individuals, precipitate an attack: they don't cause migraine (a pre-existing neurological condition) but lower the threshold for an episode. Food triggers are among the most commonly cited by patients (up to 50% report food-related triggers), yet the causal relationship isn't always confirmed by scientific evidence.

Main food triggers: Evidence and myths

Alcohol: The food trigger with the strongest evidence. Alcohol in general (not just red wine) triggers migraine in roughly 30–35% of migraine sufferers. Red wine is most frequently mentioned: it contains alcohol plus tyramine, histamine, and tannins. Alcohol causes vasodilation and increases serotonin release—both can precipitate migraine in susceptible people. Caffeine: A biphasic relationship. In low doses (1–2 cups daily), caffeine can reduce migraine pain (it's included in many headache medications). But caffeine withdrawal (like the morning after a caffeine-free day) can trigger rebound headache. Excessive caffeine consumption (more than 3–4 cups daily) is a risk factor for medication overuse headache and chronic migraine. Tyramine: A vasoactive amine found in aged cheeses (Parmesan, Grana Padano, Gorgonzola, Emmental), red wines, beer, cured meats, fermented foods, and chocolate. The theory is that tyramine triggers migraine through noradrenaline release. Controlled studies show a modest and highly individual effect: not all migraine patients react to tyramine. Nitrates: Present in processed meats (sodium nitrite as a preservative: E250) and some vegetables (beets, spinach, lettuce). Nitrates are converted to nitric oxide (NO), a potent cerebral vasodilator. An association is documented in studies, but clinical effects vary. Histamine: Found in red wines, aged cheeses, canned fish (tuna, anchovies), shellfish, and fermented foods. In some people with diamine oxidase (DAO) deficiency—the enzyme that breaks down intestinal histamine—excess dietary histamine can trigger headache, hives, itching, and gastrointestinal symptoms. A DAO deficiency test (blood work) can identify these patients. Monosodium glutamate (MSG, E621): Frequently cited as a trigger, but controlled trials haven't shown consistent effects at typical food doses. The "Chinese restaurant syndrome" (headache after MSG-laden meals) isn't supported by double-blind study evidence.

Using a food diary to identify your personal triggers

A food diary is the gold standard for identifying your personal food triggers in migraine. Suspicion alone isn't enough—you need systematic data to distinguish real triggers from false positives (coincidences). Diary structure: Each day, record: foods and beverages consumed (with approximate quantities and times), any migraine attacks (start time, intensity 0–10, duration, medications taken), confounding factors (stress, sleep hours, menstrual cycle for women, weather changes, physical activity). Minimum period: 2–3 months to gather sufficient data (at least 4–6 migraine episodes for interpretable patterns). How to analyze your diary: Identify days with migraine attacks and look back 6–24 hours (the typical food trigger latency): what did you eat in the preceding hours that you don't normally eat on attack-free days? Watch for false positives: many patients suspect chocolate as a trigger. But hunger (a powerful migraine trigger) often creates chocolate cravings as an early symptom of the prodrome—chocolate didn't cause the attack; it was a sign of its imminent arrival. Migraine diary apps: Migraine Buddy (most comprehensive), Curelator Headache (with automatic trigger analysis), N1-Headache (personalized trigger analysis). Many also track non-food triggers (sleep, stress, weather—often more relevant than food triggers).

Anti-inflammatory diet in migraine

Beyond eliminating triggers, some research suggests that an anti-inflammatory dietary pattern may reduce migraine attack frequency long-term. Omega-3 and migraine: A study by Ramsden et al. (BMJ, 2021, 182 patients RCT): high omega-3 + low omega-6 diet vs. high omega-6 diet for 16 weeks. The high omega-3 diet reduced migraine frequency by 30–40% compared to high omega-6. The effect is mediated by reduced inflammatory prostanoids (prostaglandins) and increased 17-HDHA oxylipins (natural pain relievers). Reducing omega-6 (corn oil, sunflower oil, ultra-processed foods) appears as important as increasing omega-3. Vitamin B2 (riboflavin): 400 mg/day of riboflavin showed a 50% reduction in migraine frequency in a study of 55 patients (Schoenen et al., 1998). Mechanism: it improves mitochondrial function in brain cells (migraine has a documented mitochondrial component). Magnesium: Meta-analysis by Sun-Edelstein and Mauskop (2009): oral magnesium (magnesium citrate or glycinate: 400–600 mg/day) reduced migraine frequency by 41% vs. placebo. It's one of the most evidence-backed supplements for migraine. Magnesium deficiency (very common in the average Italian diet due to food processing) has been documented in the cerebrospinal fluid of migraine patients during attacks.

Medication Overuse Headache: The Role of Diet

Medication overuse headache (MOH) is one of the most common complications of chronic migraine, where frequent use of painkillers (more than 10-15 days per month of triptans or analgesics) paradoxically increases headache frequency. Diet can help prevent MOH indirectly: by reducing attack frequency through preventive strategies (omega-3, magnesium, avoiding identified triggers), patients need fewer symptom-relief medications and lower their MOH risk. Fasting and irregular meals as triggers: prolonged fasting (skipping meals, going hours without eating) is one of the most well-documented migraine triggers. Maintaining regular meals (eating breakfast, not going more than 3-4 hours without food) is a simple preventive strategy that's often highly effective. Dehydration as a trigger: even mild dehydration is documented as a migraine trigger. Staying properly hydrated (1.5-2 liters of water daily) is a basic preventive measure. Caffeine and MOH: consuming more than 3-4 coffees daily is a risk factor for MOH. Gradually reducing caffeine (not abruptly, which causes withdrawal headaches) to 1-2 coffees daily is often part of MOH detoxification protocols.

Hormonal Migraine: The Role of Nutrition

Migraines affect women 3 times more than men, with peak frequency during reproductive years and a strong correlation with hormonal cycles (menstrual migraine, menopausal migraine). Diet can indirectly modulate sex hormones relevant to migraine. Body weight and estrogen: adipose tissue produces estrogen through aromatase. Being overweight increases estrogen levels and may contribute to estrogen-related migraine. Weight loss in overweight women with chronic migraine often reduces attack frequency. Phytoestrogens (soy isoflavones, flax lignans): have weak estrogenic effects that in some perimenopausal women may reduce estrogen variability that triggers migraine. No specific studies exist on migraine and phytoestrogens. Magnesium and the cycle: magnesium levels drop before menstruation. Magnesium supplementation (especially in the second phase of the cycle: days 15-28) reduces menstrual migraine frequency in randomized studies (Peikert et al., 1996). Vitamin E: 400 IU daily in the second cycle phase showed reduced menstrual migraine in some preliminary studies.