“Vitamin B2 (mixed)?”Here!riboflavin
Hasn’t appeared in a scanned product yet.
As a supplement
Talk to your doctor or pharmacist.
Roll Call does not check drug interactions or assess personal safety.
A B vitamin involved in converting food into usable energy. "Mixed" on a label usually just indicates it is sourced from more than one form or supplier, not a different vitamin.
Why it’s used
Taken to meet daily riboflavin needs and to correct or prevent deficiency, which is uncommon where diets are varied.
What the evidence is for
preventing and correcting riboflavin deficiency.
What the evidence says
NIH's Office of Dietary Supplements describes riboflavin's established role in energy metabolism and in preventing deficiency. Riboflavin has also been studied at higher doses for migraine prevention, an area where evidence is more preliminary and separate from ordinary deficiency-correction use.
Dose studied
1.1–1.3 mg — adult RDA, per NIH ODS.
Context
The adult RDA is 1.1-1.3 mg per day, per NIH ODS. No tolerable upper intake level has been set, as excess riboflavin has not been shown to cause harm at typical supplement doses.
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 inadequate riboflavin intake or riboflavin transporter deficiency.
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.