“Vitamin B2 (unspecified)?”Here!riboflavin
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As a supplement
Talk to your doctor or pharmacist.
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A water-soluble B vitamin involved in energy metabolism, found naturally in dairy, eggs, meat, and green vegetables.
Why it’s used
Taken to meet dietary requirements and, in higher doses, sometimes used for migraine prevention.
What the evidence is for
correcting riboflavin deficiency.
What the evidence says
NIH ODS confirms riboflavin's essential role and that supplementation corrects deficiency, which can cause skin and mouth changes. Separately, some clinical research has examined higher-dose riboflavin for reducing migraine frequency, with mixed but somewhat encouraging results, though this is a distinct use from ordinary dietary supplementation.
Dose studied
1.1–1.3 mg — adult RDA, per NIH ODS.
Context
Deficiency-correction doses sit near the RDA; migraine-prevention studies used considerably higher daily amounts over months.
Rumors
Correcting riboflavin deficiency, which causes cracked lips and sores at the corners of the mouth, sore throat, itchy red eyes, hair loss and skin disorders.
Supports — establishedhealth and safety evidence
Studied in: people with riboflavin transporter deficiency (a rare genetic disorder causing riboflavin deficiency).
Measured as an outcome.
- Riboflavin - Health Professional Fact Sheet (Regulatory) · Funding not checked
How much is a reference amount
- 1.1 mg a dayfor adults 19 and over, women · Recommended Dietary Allowance
No upper limit has been set — the data was not sufficient to set one, which is a gap in the research rather than a finding about safety.
- 1.3 mg a dayfor adults 19 and over, men · Recommended Dietary Allowance
No upper limit has been set — the data was not sufficient to set one, which is a gap in the research rather than a finding about safety.
The legacy corpus stored this as a range, 1.1–1.3 mg. It is not a range: it is the RDA for women and the RDA for men. No UL was set.
Every applicable line is shown because we don’t know which one is yours, and a reference intake is a target for a population, not a threshold for harm.