Best Vitamin B2
The best vitamin b2 we track, ranked by real cost-per-dose — not paid placements. Across 15 brands, 2 are third-party tested in a public registry. Across 45 tracked options the typical dose runs $0.12 per serving.
Updated August 2026prices checked what’s changed
Ranked across 50 products · prices checked Aug 24, 2026
3rd-party testedBulkSupplements.com Riboflavin Capsules - 100mg, 365 Count (Pack of 1)
NSF Certified for Sport brand at $0.05 per serving.
How we rank
We rank by cost-per-dose — price ÷ servings, normalized to the daily dose— so bottle sizes and strengths compare fairly. Prices are scraped at publication and re-checked when the catalog refreshes (see the “Prices checked” stamp above). There is no paid placement and no kickback for ordering. Full methodology · Editorial standards.
That cost-per-dose number is the one most retailers and review sites leave out — they’ll show a sticker price and a serving size, but not what a day actually costs. We compute it for every product so you can compare like for like.
When cheapest ≠ best value
The cheapest bottle isn’t automatically the best value: a low-absorption form (magnesium oxide is the classic example) can look cheap per milligram yet deliver less of what you actually absorb. Where forms differ, compare cost per absorbed or elemental unit, not the compound weight on the label. A bigger bottle isn’t automatically cheaper per dose either — this list already ranks by cost per dose, so a larger count only wins if it truly costs less per serving. Compare Vitamin B2 forms.
Our data on this: the big bottle saves a median ~86% per serving · the gummy tax (~2× more) · the form premium · the price spread.
Full ranking by cost per dose
Cost-per-serving normalizes price across bottle sizes — a 60-count and a 365-count compare fairly. Top 20 of 50 shown.
See also: Vitamin B2 basics · all best-value rankings · vitamin b2 cost-per-dose breakdown
Vitamin B2 brands we compare — which are third-party tested?
2 of the 15 brands ranked above appear in an independent certifier's own public registry. A certification confirms the label matches the contents — it says nothing about how well the supplement works, and an uncertified brand is not automatically worse.
Frequently asked
What is the best-value Vitamin B2 supplement?+
Horbäach Vitamin B2 100mg | 180 Capsules | Riboflavin Supplement | Non-GMO… — $0.05 per serving ($8.99 for 180 servings), the lowest cost-per-dose vitamin b2 in our Amazon US catalog as of August 2026.
How much does Vitamin B2 cost per day?+
The cheapest vitamin b2 we track works out to $0.05 per serving, against a typical $0.12 per serving across 45 products. Retailers and review sites list a price and a serving size but rarely divide it out — this is what a day actually costs, as of August 2026.
What is the typical cost per dose for Vitamin B2?+
About $0.12 per serving across 45 tracked vitamin b2 products — the cheapest we track is $0.05 per serving, with most falling between $0.08 and $0.20.
What is the highest-quality Vitamin B2 supplement?+
Of the 15 vitamin b2 brands ranked here, 2 hold a third-party certification we could verify in a public registry: BulkSupplements.com (NSF Certified for Sport), Natural Factors (USP Verified). Certification means an independent lab confirmed the label matches the contents and screened for contaminants — it does not rate how well the supplement works. The cheapest certified option is BulkSupplements.com Riboflavin Capsules - 100mg at $0.05 per serving.
Which Vitamin B2 brands are third-party tested?+
BulkSupplements.com — NSF Certified for Sport; Natural Factors — USP Verified. We only count a brand as tested when it appears in the certifier's own public registry (USP Verified, NSF Certified for Sport, Informed Choice), never on a claim printed on the label. The remaining 13 brands on this page have no certification we could verify.
Which Vitamin B2 is the top rated?+
We don't republish marketplace star ratings — they belong to the retailer, they move constantly, and a 4.6 average tells you nothing about what is in the capsule. The two things you can verify are what a dose costs and whether an independent lab checked the label. On both counts, BulkSupplements.com Riboflavin Capsules - 100mg stands out: NSF Certified for Sport certified at $0.05 per serving.
What dose of Vitamin B2 do these supplements come in?+
The vitamin b2 products we track range from 3mg to 400mg per serving. We rank by cost per serving so you can compare value across strengths — check the label for the dose that suits you.
Independent testing
2 of 15 tracked Vitamin B2 brands here are flagged as carrying independent third-party testing — a voluntary check of a product's identity, potency and contaminants by an outside lab. It's a quality signal, not a value or efficacy claim. Confirm any brand's current status on the official registries:
Testing status is self-reported by the brand or drawn from public certification and may change — always verify on the official registry before purchase.
References & sources
- Vitamin B2 — Health Professional fact sheet — NIH Office of Dietary Supplements
- USP Verified product participants — U.S. Pharmacopeia
- NSF certified products — NSF
We link primary sources and paraphrase their findings — never copy their text, tables, or images. Cost-per-dose figures are our own first-party catalog data.