AHS Level B Evidence — strongest supplement evidence
The American Headache Society lists these at Level B (probably effective) — same evidence tier as some prescription preventives. These are the supplements migraine specialists most often recommend.
AHS Level C Evidence — possibly effective
Level C means possibly effective — supportive trial data but less consistent than Level B. CoQ10 in particular has growing evidence and is widely used.
Mechanism-Adjacent Options
Melatonin has emerging evidence for migraine prevention specifically (not just sleep). 5-HTP and peppermint have more preliminary evidence.
Acute Symptom Relief — adjuncts only
These don't prevent migraines but may help with associated symptoms during an attack. Capsaicin (intranasal) has data; peppermint topically may ease headache.
Frequently Asked Questions
What is the best supplement for migraines?
Magnesium has the strongest evidence and the AHS Level B rating. Magnesium oxide 400-600 mg/day or magnesium glycinate at similar doses reduces migraine frequency in many sufferers. CoQ10 100-300 mg/day and riboflavin 400 mg/day are next in evidence quality. Effects build over 8-12 weeks — these are preventives, not acute treatments. About 30-50% of migraine sufferers respond meaningfully to one of these supplements.
How long until migraine supplements work?
8-12 weeks for full effect. Magnesium can show partial benefit in 4-6 weeks. CoQ10 and riboflavin typically take 8-12 weeks. Butterbur shows effects in 4-8 weeks. If a supplement hasn't reduced migraine frequency by 30%+ after 12 weeks at proper doses, it's probably not your responder. Keep a migraine diary to objectively assess change.
Is butterbur safe?
Mixed. Butterbur (Petasites hybridus) at PA-free standardized extracts (Petadolex specifically) showed strong evidence for migraine prevention. But butterbur naturally contains pyrrolizidine alkaloids that are hepatotoxic, and quality control varies. The AHS removed butterbur from active recommendations partly due to liver injury concerns. If using, choose only PA-free standardized products and tell your doctor.
Can I take migraine supplements with prescription preventives?
Most can be combined safely. Magnesium, riboflavin, and CoQ10 don't interact significantly with topiramate, beta-blockers, or anti-CGRP medications. Always tell your doctor what supplements you're taking. The combination approach (prescription + supplement) often works better than either alone — supplements address mitochondrial and magnesium deficiency contributions while medications target the migraine pathway.
What about for menstrual migraines?
Magnesium has particular evidence for menstrual migraine — both as daily prevention and started 7-10 days before menstruation. Daily 400-600 mg of magnesium glycinate or oxide is the standard approach. Riboflavin and CoQ10 also help, but the perimenstrual magnesium dosing has the most specific data.
When should I see a neurologist or headache specialist?
See a specialist for migraines occurring more than 4-8 days per month (chronic migraine territory), migraines causing significant disability or work absence, sudden severe headaches unlike previous migraines (red flag), migraines with new neurological symptoms, or migraines unresponsive to OTC treatments. Modern migraine treatment includes anti-CGRP medications (Aimovig, Emgality, Ajovy) that have transformed care for many patients.