Vitamin

    Vitamin B2

    Riboflavin

    TL;DR

    Riboflavin deficiency is rare in fortified-grain countries, but 400 mg/day — hundreds of times the RDA — has repeated randomized support for reducing migraine frequency.

    Ideal For

    • People with frequent migraine seeking a low-risk preventive
    • Those with MTHFR TT genotype and elevated homocysteine

    Avoid If

    • Expecting a general energy boost — that only follows from correcting true deficiency

    Frequently Asked Questions

    Overview

    Riboflavin is the backbone of FAD and FMN, the flavin coenzymes that shuttle electrons through complexes I and II of the mitochondrial respiratory chain and regenerate glutathione via glutathione reductase. Ordinary nutritional deficiency is uncommon where grains are fortified, and when it occurs it shows up as angular cheilitis, sore tongue and normocytic anemia rather than the vague fatigue supplement marketing suggests. The interesting use is pharmacological. Migraine is associated with a subtle deficit in mitochondrial energy reserve, and 400 mg/day of riboflavin — roughly 300 times the RDA — has been tested as a way to raise flavin availability in that setting. It is also the required cofactor for MTHFR, which is why riboflavin status modulates homocysteine and blood pressure in people carrying the TT genotype. Riboflavin is water-soluble with no established toxicity; the main practical effect of high doses is bright fluorescent-yellow urine.

    How It Works

    • Precursor to FAD and FMN, cofactors in mitochondrial complexes I and II
    • Regenerates reduced glutathione through glutathione reductase
    • Required cofactor for MTHFR, influencing homocysteine metabolism

    Quick Facts

    • Migraine trials use 400 mg/day — about 300x the RDA
    • No established upper limit; excess is excreted in urine
    • Turns urine bright yellow, which makes blinding trials difficult

    Benefits & Outcomes

    Migraine Prevention

    Pain
    Strong Evidence

    High-dose riboflavin (400 mg/day) is one of the best-supported migraine preventives, halving attack frequency in landmark RCTs with an excellent safety profile.

    Health Concerns Addressed

    Migraine Disorder

    condition
    Likely effective
    Moderate Evidence
    Effectiveness 4/5

    Adult evidence is reasonably consistent and the safety profile is close to unbeatable, but pediatric trials were negative and blinding is compromised by yellow urine.

    Riboflavin Deficiency

    condition
    Likely effective
    Effectiveness 4/5

    Direct replacement therapy — supplementation reliably corrects the deficiency it treats.

    Supporting Research
    15 studies

    Comparison between Acupuncture and Nutraceutical Treatment with Migratens in Patients with Fibromyalgia Syndrome

    Score: 6/10
    2020
    rct
    n=55

    Schweiger V

    In 55 patients with fibromyalgia, both acupuncture and the nutraceutical Migratens (containing coenzyme Q10, magnesium, riboflavin and related nutrients) over 12 weeks reduced pain, fatigue and Fibromyalgia Impact Questionnaire scores versus baseline, with acupuncture producing faster relief and comparable outcomes at study end.

    View source

    Effects of selected dietary supplements on migraine prophylaxis: A systematic review and dose-response meta-analysis of randomized controlled trials

    Score: 8/10
    2025
    meta_analysis

    Talandashti MK, Shahinfar H, Delgarm P +1 more

    Magnesium supplementation reduced migraine attacks (mean difference (MD) = -2.51), severity (MD = -0.88), and the monthly migraine days (MD = -1.66) compared with the control group.

    View source

    Effectiveness of high-dose riboflavin in migraine prophylaxis: a randomized controlled trial

    Score: 7/10
    1998
    rct
    n=55

    Schoenen J, Jacquy J, Lenaerts M

    Riboflavin was superior to placebo, with 59% versus 15% of patients achieving at least a 50% reduction in attacks.

    View source

    Causes and Clinical Sequelae of Riboflavin Deficiency

    Score: 5/10
    2023
    systematic_review

    McNulty H, Pentieva K, Ward M

    There are adverse health consequences of low and deficient riboflavin status throughout the life cycle, including anemia and hypertension.

    View source

    Improvement of migraine symptoms with a proprietary supplement containing riboflavin, magnesium and Q10: a randomized, placebo-controlled, double-blind, multicenter trial

    Score: 7/10
    2015
    rct
    n=130

    Gaul C, Diener HC

    Migraine days decreased more with the riboflavin, magnesium and coenzyme Q10 combination than placebo, though the primary endpoint was not met

    View source

    Vitamins and minerals for migraine prophylaxis: a systematic review and meta-analysis

    Score: 8/10
    2019
    meta_analysis

    Okoli GN, Rabbani R, Kashani HH +3 more

    Pooled estimates favoured riboflavin for reducing migraine days, with low to moderate certainty of evidence.

    View source

    Correcting a marginal riboflavin deficiency improves hematologic status in young women in the United Kingdom (RIBOFEM)

    Score: 7/10
    2011
    rct
    n=123

    Powers HJ

    Moderately poor riboflavin status can affect iron status: the lower the riboflavin status, the greater the hematologic benefits of improving status.

    View source

    Prophylaxis of migraine headaches with riboflavin: a systematic review

    Score: 7/10
    2017
    systematic_review

    Thompson DF, Saluja HS

    Adult trials generally showed reduced attack frequency at 400 mg daily, whereas paediatric trials were largely negative.

    View source

    Blood pressure in treated hypertensive individuals with the MTHFR 677TT genotype is responsive to intervention with riboflavin: findings of a targeted randomized trial

    Score: 7/10
    2013
    rct
    n=91

    Wilson CP

    Riboflavin supplementation targeted at hypertensive individuals with the MTHFR 677TT genotype can decrease BP more effectively than treatment with current antihypertensive drugs only.

    View source

    Riboflavin lowers blood pressure in cardiovascular disease patients homozygous for the 677C-->T polymorphism in MTHFR

    Score: 7/10
    2010
    rct
    n=181

    Horigan G

    Riboflavin is effective in reducing blood pressure specifically in patients with the MTHFR 677 TT genotype.

    View source

    High-dose riboflavin for migraine prophylaxis in children: a double-blind, randomized, placebo-controlled trial

    Score: 7/10
    2008
    rct
    n=48

    MacLennan SC, Wade FM, Forrest KML +3 more

    Riboflavin 200 mg daily produced no significant difference from placebo in children with migraine.

    View source

    Effect of Vitamin B2 supplementation on migraine prophylaxis: a systematic review and meta-analysis

    Score: 7/10
    2022
    meta_analysis
    n=673

    Chen YS

    Vitamin B2 400 mg/day for three months supplementation had significant effect on days, duration, frequency, and pain score of migraine attacks.

    View source

    Prophylactic effect of riboflavin on pediatric migraine: a randomized, double-blind, placebo-controlled trial

    Score: 6/10
    2018
    rct
    n=90

    Talebian A, Soltani B, Banafshe HR +1 more

    There was a significant decrease of migraine frequency (p=0.000) and mean duration (p=0.000) in the high-dose group compared with the placebo group.

    View source

    Riboflavin has neuroprotective potential: focus on Parkinson disease and migraine

    Score: 4/10
    2017
    systematic_review

    Marashly ET, Bohlega SA

    Riboflavin deficiency impairs mitochondrial electron transport, providing a plausible basis for benefit in migraine.

    View source

    High-dose riboflavin treatment is efficacious in migraine prophylaxis: an open study in a tertiary care centre

    Score: 3/10
    2004
    observational
    n=23

    Boehnke C, Reuter U, Flach U +3 more

    Mean headache frequency fell from four to two attacks per month during open-label high-dose riboflavin.

    View source

    Safety Information

    Potential Side Effects

    Bright yellow urine is universal at high doses and harmless. Occasional nausea or diarrhoea. No toxicity has been established even at gram doses.

    Contraindications

    None established. Photosensitizing in vitro but not clinically relevant.

    Pregnancy & Breastfeeding

    Pregnancy: likely_safe

    Breastfeeding: likely_safe

    Dosage Guidelines

    Dosage Used in Studies

    Consult healthcare provider

    Best Time to Take

    Morning with breakfast

    Best Form

    Plain riboflavin, 400 mg once daily

    Bioavailability

    Absorption is saturable — roughly 27 mg is absorbed per single dose, so very high doses are partly wasted

    Forms Compared

    Form used in essentially all migraine trials; inexpensive

    Marketed as pre-activated; no proven clinical advantage

    Food & Timing

    With a meal to reduce the small chance of nausea

    Medical Disclaimer

    The information provided on this website is for educational and informational purposes only and is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition or before starting any supplement regimen.

    Individual results may vary. The statements on this website have not been evaluated by the Food and Drug Administration. Products and information are not intended to diagnose, treat, cure, or prevent any disease.