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B-2 100 mg

NOW
4.8
★ ★ ★ ★ ★
(10893 ratings)
Riboflavin 100 mg
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Score83
A simple high-potency riboflavin capsule with a clearly disclosed amount. The standard form is less distinctive than active B2, while value is excellent.
How scoring works
Quantity:100 Capsule(s) • (100 servings)
Goals:

Score 83

A simple high-potency riboflavin capsule with a clearly disclosed amount. The standard form is less distinctive than active B2, while value is excellent.
How scoring works
$5.80($0.05 per serving)
Pure Formulas
$ 5.94
Vitacost
$ 6.49
Daily Vita
$ 5.80
iHerb
$ 6.11
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Analysis

Riboflavin is the only active and is supplied at 100 mg in a simple daily serving. That high-potency design suits a deliberate B2 plan better than ordinary nutritional maintenance.

The label uses regular vitamin B2 rather than riboflavin 5'-phosphate. A plain capsule is practical, but it does not add a delivery feature for a water-soluble vitamin.

The bottle provides a practical extended supply. Value is especially favorable for a focused single-ingredient supplement.

Who is it for
  • Adults intentionally seeking a high-potency riboflavin supplement
  • People who prefer a simple one-active capsule
Best for
  • Focused vitamin B2 supplementation
  • A straightforward single-ingredient routine

Pros

  • Clearly disclosed 100 mg amount
  • Single-active formula
  • Convenient one-capsule serving
  • Practical bottle supply

Cons

  • Uses standard riboflavin rather than an active coenzyme form
  • Amount is far above routine nutritional needs
  • No special delivery feature is listed
  • Complete excipient details are not provided in the input

Warnings

  • High-dose riboflavin commonly turns urine bright yellow; the color change is expected and harmless.
  • A large riboflavin serving may cause nausea or loose stools in sensitive users.
  • Long-term high-dose use is best reserved for a specific purpose rather than added casually to other B-complex products.

Nutrient quality

86 Highest impact

The riboflavin amount is meaningful, although the standard form requires conversion. A focused ingredient list keeps the formula aligned with its purpose.

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Ingredient transparency

81 Highest impact

Active ingredients and amounts are disclosed without a hidden key dose. Full usage directions and inactive ingredients are not supplied.

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Customer satisfaction

72 High impact

Customer ratings are strong with a very large volume of ratings. Specific review comments are absent, so recurring complaints and purpose-matched experiences cannot be judged.

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Value for money

94 Highest impact

Serving economics are highly favorable for the supplied amount. A focused ingredient list preserves core value.

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Ingredients

IngredientAmount per serving
Riboflavin (Vitamin B2)
 100 mg
Gluten Free Adults 18–50 Kosher Dairy Free
Report overview
Riboflavin (Vitamin B2) · 100 mg OverallScore77
D- Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyA+ Value

The high-potency dose supports substantial metabolic intake, but standard riboflavin requires conversion before use. A capsule should release efficiently, and the focused formula avoids unnecessary listed additives. Very low serving cost provides strong value.

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83 Performance

R-5-P Coenzymated Vitamin B-2 50 mg

Swanson Ultra
<p>Active riboflavin 5-phosphate provides a clearer form-quality upgrade over the original’s standard riboflavin at 100 mg. The supplied label provides active riboflavin 5-phosphate at 50 mg, though the phosphate weight may not state the exact riboflavin yield and full directions are missing.</p>
83 Performance

BioCoenzymated Riboflavin 5'-Phosphate 50 mg

Natural Factors
<p>Active riboflavin 5-phosphate provides a clearer form-quality upgrade over the original’s standard riboflavin at 100 mg. The supplied label provides active riboflavin 5-phosphate at 50 mg, though the phosphate weight may not state the exact riboflavin yield and full directions are missing.</p>
79 Performance

Riboflavin 5'-Phosphate

Thorne
<p>Active riboflavin 5-phosphate provides a clearer form-quality upgrade over the original’s standard riboflavin at 100 mg. The supplied label provides active riboflavin 5-phosphate at 36.5 mg, though the phosphate weight may not state the exact riboflavin yield and full directions are missing.</p>
83 Budget

Riboflavin 100 mg

Swanson
<p>Low serving cost keeps standard riboflavin at 100 mg among the nearest budget options available in the supplied list. Its cost is not clearly below the original’s, so the value case depends on whether the different dose, form, or supporting ingredients fit better.</p>
83 Budget

Riboflavin Vitamin B2 100 mg

Nature's Way
<p>Low serving cost keeps standard riboflavin at 100 mg among the nearest budget options available in the supplied list. Its cost is not clearly below the original’s, so the value case depends on whether the different dose, form, or supporting ingredients fit better.</p>
83 Budget

Vitamin B2 100 mg

NaturesPlus
<p>Low serving cost keeps standard riboflavin at 100 mg among the nearest budget options available in the supplied list. Its cost is not clearly below the original’s, so the value case depends on whether the different dose, form, or supporting ingredients fit better.</p>
82 Value

Vitamin B2 100 mg

Nutricost
<p>A stronger quality-to-cost balance makes standard riboflavin at 100 mg a practical value alternative to the original’s standard riboflavin at 100 mg. The supplied label keeps the riboflavin form and amount assessable, while the different dose, format, or supporting ingredients may affect individual fit.</p>
82 Value

Vitamin B2 100 mg

Solgar
<p>A stronger quality-to-cost balance makes standard riboflavin at 100 mg a practical value alternative to the original’s standard riboflavin at 100 mg. The supplied label keeps the riboflavin form and amount assessable, while the different dose, format, or supporting ingredients may affect individual fit.</p>
82 Value

B-2 100 mg

Nature's Bounty
<p>A stronger quality-to-cost balance makes standard riboflavin at 100 mg a practical value alternative to the original’s standard riboflavin at 100 mg. The supplied label keeps the riboflavin form and amount assessable, while the different dose, format, or supporting ingredients may affect individual fit.</p>
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