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Riboflavin for Migraine: What a Randomized Trial Found

This content is for informational purposes only and does not constitute medical advice. Statements about dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease. Individual results may vary — consult your healthcare provider before starting any supplement. Full disclaimer

In a landmark randomized controlled trial, riboflavin (vitamin B2) at 400 mg/day was associated with a significant...

In a landmark randomized controlled trial, riboflavin (vitamin B2) at 400 mg/day was associated with a significant reduction in migraine attack frequency over 3 months versus placebo, with 59% of riboflavin users improving by at least half (vs 15% on placebo). Later meta-analysis supports a benefit on migraine days and frequency. Benefit typically builds after the first month.

Key Findings

  • In a 3-month randomized controlled trial (55 participants), riboflavin 400 mg/day was associated with a significant reduction in migraine attack frequency (p=0.005) and headache days versus placebo.
  • The proportion of "responders" (≥50% improvement) was 59% with riboflavin versus 15% with placebo.
  • Benefit did not begin until after the first month and was greatest by month three, so consistent use matters.
  • A later systematic review and meta-analysis supported a positive effect of vitamin B2 on migraine frequency, duration, and related measures.

Study Details

Effectiveness of high-dose riboflavin in migraine prophylaxis. A randomized controlled trial
Schoenen J, Jacquy J, Lenaerts M — Neurology (1998)
Riboflavin 400 mg/day for 3 months was associated with significantly reduced migraine attack frequency and headache days vs placebo; 59% of riboflavin users were responders vs 15% on placebo.
55 participantsModerate

Practical Takeaway

High-dose riboflavin (vitamin B2), commonly studied at 400 mg/day, has been studied for supporting a lower migraine frequency, with a well-tolerated profile and a low cost. Because the benefit typically takes a month or more to appear, consistent daily use over at least 2–3 months is how trials assessed it. Riboflavin is generally safe (it can turn urine bright yellow, which is harmless), but migraine management should be guided by a clinician — this is supportive information, not a treatment plan, and new, severe, or changing headaches warrant medical evaluation.

Summary

A randomized controlled trial found high-dose riboflavin (vitamin B2) was associated with fewer migraine attacks, an effect supported by later meta-analysis.

Related Supplements

Vitamin B2 (Riboflavin)

Related Conditions

Energy & FatigueEye Health

Learn More

Supplements and Headaches: What Research Shows
Riboflavin (Vitamin B2): What It Does and How Much You Need
Why Some Nutrients Have No Upper Limit

Frequently Asked Questions

Does vitamin B2 (riboflavin) help with migraines?

In a randomized controlled trial, riboflavin 400 mg/day was associated with significantly fewer migraine attacks over 3 months versus placebo, and later meta-analysis supported a benefit on migraine frequency and days. It is studied as a preventive (prophylactic) option, not a treatment for an attack in progress.

How much riboflavin was used for migraine, and how long does it take?

The studied dose is 400 mg/day. Benefit typically does not begin until after the first month and is greatest by about three months, so consistent daily use over at least 2–3 months is how it was evaluated.

Is high-dose riboflavin safe?

Riboflavin is generally well tolerated; the most noticeable effect is bright yellow urine, which is harmless. As with any preventive approach, discuss it with your clinician, especially if you have other conditions or take medications.

Should I see a doctor about my migraines?

Yes — migraine benefits from proper diagnosis and a management plan. See a clinician for frequent or disabling headaches, and seek prompt care for a sudden "worst-ever" headache or headaches with new neurological symptoms.

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Supplement Guide

Vitamin B2 (Riboflavin)

Bottom line: Riboflavin at 400mg/day is a proven, safe migraine preventive — comparable to some drugs. At RDA doses (1.1-1.3mg), it supports energy and antioxidant function.

Condition Guide

Energy & Fatigue

References

  1. Schoenen J, Jacquy J, Lenaerts M (1998). Effectiveness of high-dose riboflavin in migraine prophylaxis. A randomized controlled trial. Neurology. DOI PubMed
  2. Chen YS, Lee HF, Tsai CH, et al. (2022). Effect of Vitamin B2 supplementation on migraine prophylaxis: a systematic review and meta-analysis. Nutritional Neuroscience. DOI PubMed