“Vitamin B2 (Riboflavin)?”Here!riboflavin
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As a supplement
Talk to your doctor or pharmacist.
Roll Call does not check drug interactions or assess personal safety.
A water-soluble B-vitamin the body needs to convert food into usable energy and to support normal cell function. It occurs naturally in dairy, eggs, lean meats, and green vegetables, and is manufactured synthetically for supplements and fortified foods.
Why it’s used
Taken to meet daily riboflavin requirements, particularly by people with limited dietary intake, and sometimes explored for migraine prevention.
What the evidence is for
meeting riboflavin nutritional requirements and preventing deficiency.
What the evidence says
NIH's Office of Dietary Supplements confirms riboflavin's established role in energy metabolism and notes that deficiency is uncommon in populations with varied diets but can occur with poor intake or certain health conditions. Separately, some clinical trials have examined higher-dose riboflavin (around 400 milligrams daily) for reducing migraine frequency, with the evidence described as promising but not fully conclusive.
Dose studied
1.1–1.3 mg — adult RDA per NIH ODS.
Context
The adult Recommended Dietary Allowance is about 1.1 to 1.3 milligrams per day per NIH ODS. Migraine-prevention trials have used considerably higher doses, around 400 milligrams daily, for several months, a use distinct from ordinary nutritional intake.
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
Measured as a biomarker.
- 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.