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DOSERANKEVIDENCE-BASED SUPPLEMENTSFull analysis

The short answer · Riboflavin status

Take riboflavin for riboflavin status. This is the one to buy.

NOW Foods, B-2, 100 mg, 100 Veg Capsules
1

NOW Foods, B-2, 100 mg, 100 Veg Capsules

4.8· 10,597 ratings· $0.06/serving

DoseRank score87

Riboflavin 100 mg — inside the studied 1.3-400 mg window

Of 2,260 products scored for Riboflavin status, NOW Foods, B-2, 100 mg, 100 Veg Capsules ranks #1 with a DoseRank score of 87. Riboflavin is the strongest evidence signal for this outcome.

View on iHerb— $0.06/sv60-sec quiz instead
Cheaper alternative$0.05 per servingLife Extension, Boron, 3 mg, 100 Vegetarian Capsules

Retailer links may be affiliate links. Rankings and placement are never paid.

The form“Why Riboflavin — not Vitamin B2?”Evidence Strong evidence

Riboflavin is the strongest evidence signal for this outcome.

  • RiboflavinThe pick

    Strong evidence · 100 mg

    Water-soluble vitamin B2 central to energy metabolism and antioxidant recycling; high doses around 400 mg/day are well established for migraine prevention.

  • Vitamin B2

    Strong evidence · 75 mg

    Riboflavin, a water-soluble B vitamin forming the FAD/FMN coenzymes for energy metabolism; excess turns urine bright yellow, which is harmless.

Buy the #1 pick
The dose“Is the dose actually effective?”Dose fit 72

Riboflavin at 100 mg lands inside the studied 1.3-400 mg window.

Riboflavin

Studied window 1.3-400 mg · this pick 100 mg

The ranking“Why should I trust this pick?”Trust 95

Strong trust signals — consistently high marks from verified buyer ratings. Each product gets a DoseRank score blending clinical strength, evidence, dose fit, trust and value. Retailer links may be affiliate links — the scoring model decides placement, never payment from a brand.

  • 2,260 products scored
  • Never paid placement
  • Evidence level: Strong · 92
  • 273 brands
  • 3 ingredients
See the full analysis — every score, every productHow the ranking works
The price“Can I do better than $0.06 a serving?”Value 91

$0.06 per serving — low price tier for this outcome. The cheapest ranked pick here is $0.05 per serving.

  • 3
    Life Extension, Boron, 3 mg, 100 Vegetarian CapsulesScore 87 · $0.05/serving
    iHerb

Why not the absolute cheapest? The DoseRank score also weighs clinical strength, evidence, dose fit and trust — the very cheapest listings rarely hold up everywhere else.

Ready?

The #1 pick is $0.06 a serving.

NOW Foods, B-2, 100 mg, 100 Veg Capsules — in stock at a tracked retailer.

View on iHerb
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NOW Foods, B-2, 100 mg, 100 Veg Capsules ranks #1 for Riboflavin status with a DoseRank score of 87. The score blends clinical strength, evidence, dose fit, trust signals and value across 2,260 products scored for this outcome.

Riboflavin is the strongest evidence signal for this outcome.

Riboflavin at 100 mg lands inside the studied 1.3-400 mg window. DoseRank scores this product's dose fit at 72 out of 100.

NOW Foods, B-2, 100 mg, 100 Veg Capsules works out at $0.06 per serving. $0.06 per serving — low price tier for this outcome. The cheapest ranked pick here is $0.05 per serving.

No. Retailer links may be affiliate links, but rankings and placement are never paid. Every product is scored by the same public model, and the ranking is recomputed from the underlying product data rather than edited by hand.

Use rankings as research support

DoseRank rankings are informational and not medical advice. If you are pregnant, breastfeeding, using medications, or managing a health condition, ask a qualified clinician whether a supplement fits your situation. Stop use and report concerning adverse events to a clinician, the product maker, or the retailer.

Disclosure

Retailer links may be affiliate links. Rankings and placement are not paid placement.

NOW Foods, B-2, 100 mg, 100 Veg Capsules

$0.06/serving · ★ 4.8 · In stock

60-sec quizView on iHerb