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
4.8· 10,597 ratings· $0.06/serving
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.
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.
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
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.
- 3Life Extension, Boron, 3 mg, 100 Vegetarian CapsulesScore 87 · $0.05/servingiHerb
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.
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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.