Vitamin B2 (riboflavin)
Full ranking Dose tool Products (4,314)
Key facts
Sources: https://ods.od.nih.gov/factsheets/Riboflavin-HealthProfessional/ · FDA DV 1.3 mg (https://www.fda.gov/food/nutrition-facts-label/daily-value-nutrition-and-supplement-facts-labels); pre-2016 DV [1.7] (https://www.federalregister.gov/documents/2016/05/27/2016-11867/food-labeling-revision-of-the-nutrition-and-supplement-facts-labels); no UL set
Daily dose across products (mg/day)
Label data from official national databases and brand websites, as declared; not lab-verified.
Common forms
| Form | Products | Median | P5–P95 | Elemental fraction |
|---|---|---|---|---|
| Riboflavin | 3339 | 2.93 mg | 0.17 – 75 | — |
| Riboflavin 5-phosphate | 1048 | 5 mg | 0.43 – 50 | — |
Common questions
What is the Daily Value for Vitamin B2 (riboflavin)?
The US FDA Daily Value for adults and children aged 4 and over is 1.3 mg. It is a labelling reference, not a personal recommendation. [source]
How much Vitamin B2 (riboflavin) do products usually contain per day?
As of 2026-11-01, 4,314 products list a comparable daily dose (4,445 dose records; one product can have several). The median is 3.6 mg per day, and 90% of records fall between 0.25 and 60 mg. Figures come from labels and are not lab-tested. [source]
What are the side effects of Vitamin B2 (riboflavin)?
Riboflavin (vitamin B2) has not been shown to cause any harm, and supplements usually have very few side effects. (Source: NIH ODS) [source]
What happens if you take too much Vitamin B2 (riboflavin)?
No UL has been set. Many supplements far exceed the recommended amount, but the body can absorb only about 27 mg at a time. (Source: NIH ODS) [source]
Is Vitamin B2 (riboflavin) safe during pregnancy and breastfeeding?
The recommended amount is 1.4 mg a day in pregnancy and 1.6 mg while breastfeeding. Pregnant and breastfeeding women and their babies are among the groups more likely to get too little. (Source: NIH ODS) [source]
Does Vitamin B2 (riboflavin) interact with medications or other supplements?
Riboflavin is not known to interact with any medications. (Source: NIH ODS) [source]
Top ranked
| Rank | Brand | Product | Per day | Score |
|---|---|---|---|---|
| 1 | Nature's Bounty | B-2 100 mg | 100 mg | 97.8 |
| 1 | Swanson | Riboflavin 100 mg | 100 mg | 97.8 |
| 1 | Vitamin World | Vitamin B-2 100 mg | 100 mg | 97.8 |
| 1 | The Vitamin Shoppe | Vitamin B2 100 mg | 100 mg | 97.8 |
| 1 | Spring Valley | Vitamin B2 100 mg | 100 mg | 97.8 |