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Vitamin B2

What does the research say about Vitamin B2?

2 health outcomes synthesised

Research on Vitamin B2 (riboflavin) has focused on 2 health outcomes related to migraine. The strongest evidence, drawn from 4 meta-analyses and systematic reviews, consistently supports a beneficial effect on reducing migraine frequency. Studies most often used a dose of 400 mg/day and included both pediatric and adult populations.

Strongest evidence: The most robust research on Vitamin B2 is for reducing migraine frequency, supported by 4 meta-analyses and systematic reviews with moderate evidence strength. All 4 reviews reported statistically significant beneficial effects, with effect sizes ranging from moderate to large. The most studied dose is 400 mg/day, with effects observed over a median study duration of 90 days in both pediatric and adult migraine populations.

Mixed or weaker evidence: Evidence for reducing migraine duration is weaker (low evidence strength) and mixed. Of 3 studies, 2 found beneficial effects in adults, while a large pediatric meta-analysis (n=3,771) found no significant benefit. One review reported high heterogeneity (I² = 90.4%), indicating inconsistent results across trials. Conclusions for this outcome remain preliminary.

Effective dose patterns: Across both outcomes, the most consistent dose studied is 400 mg/day of vitamin B2, taken daily. Effects for frequency reduction were observed over approximately 90 days, and the same dose and duration were used in studies for duration, though results were less consistent.

Population insights: Both pediatric and adult populations with migraine were studied. The strongest evidence for frequency reduction applies to both age groups. For duration reduction, benefits were limited to adult populations; a large pediatric study found no effect.

Notable caveats: The research for migraine frequency is subject to publication bias — null-result studies are less likely to be published. The evidence base relies on review-level papers rather than primary trials. For migraine duration, the evidence base is small (only 3 studies) and affected by high heterogeneity and conflicting results between pediatric and adult populations.

Frequently asked

  • What is Vitamin B2 good for according to research?
    Research on Vitamin B2 has focused on migraine outcomes. The strongest and most consistent evidence supports its use for reducing migraine frequency, based on 4 meta-analyses and systematic reviews that all reported significant beneficial effects. Evidence for reducing migraine duration is weaker and mixed, with benefits seen only in adult populations.
  • What dose of Vitamin B2 is typically used in studies?
    The most common dose studied across both migraine outcomes is 400 mg per day of vitamin B2 (riboflavin). Studies typically examined effects over a period of about 90 days.
  • Who benefits most from Vitamin B2?
    For reducing migraine frequency, both pediatric patients and adults with migraine showed benefits across 4 studies. For reducing migraine duration, benefits were observed only in adult populations; a large pediatric meta-analysis found no significant reduction.
  • Are there caveats or limitations in the research on Vitamin B2?
    Yes. For migraine frequency, the evidence is subject to publication bias — null results are less likely to be published. The evidence base consists of review-level papers rather than primary clinical trials. For migraine duration, the evidence is limited to only 3 studies with high heterogeneity and conflicting results between age groups, making conclusions preliminary.
  • Does Vitamin B2 help with reducing migraine frequency?
    Yes, the research consistently shows benefit. All 4 meta-analyses and systematic reviews reported statistically significant reductions in migraine frequency with vitamin B2, with effect sizes ranging from moderate to large. The most studied dose was 400 mg/day.
  • Does Vitamin B2 help with reducing migraine duration?
    The evidence is mixed. Two of 3 studies reported benefits in adult populations, but a large pediatric meta-analysis (n=3,771) found no significant reduction. The overall evidence is considered low strength, and results are inconsistent across studies.

Most-studied combinations with Vitamin B2

most supplement research is combination research
Also studied with:Magnesium (2), Vitamin B1 (4), Vitamin B6 (3), Vitamin B9 (2), Vitamin B12 (2), Vitamin D (2), Vitamin C (2)
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