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

Swanson Ultra
4.8
★ ★ ★ ★ ★
(2339 ratings)
Riboflavin 50 mg
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Score83
A focused 50 mg active-form riboflavin capsule with clear ingredient disclosure. Its main trade-off is good rather than standout serving value.
How scoring works
Quantity:60 Capsule(s) • (60 servings)
Goals:

Score 83

A focused 50 mg active-form riboflavin capsule with clear ingredient disclosure. Its main trade-off is good rather than standout serving value.
How scoring works

Also available as

2 options
18.0mg • 60 Tablet(s) servings B2 18 mg • 60 Tablet(s) • 60 servings $11.29 ($0.18 per serving) 36.0mg • 60 servings B2 36.5 mg • 60 Capsule(s) • 60 servings $32.00 ($0.53 per serving)
$12.09($0.20 per serving)
iHerb
$ 14.49
iHerb
$ 12.09
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Analysis

The 50 mg serving uses riboflavin 5'-phosphate rather than standard riboflavin. Its coenzyme form and concise capsule design are the main reasons to choose it.

The active form avoids the initial conversion step required by standard riboflavin, although most people can still use conventional B2. The label does not provide added purity or release details beyond the named form.

The package provides a moderate supply for assessing regular use. Practical value is good for an active-form product.

Who is it for
  • Adults deliberately seeking riboflavin 5-phosphate
  • People who prefer an active coenzyme form over standard B2
Best for
  • Active-form vitamin B2 supplementation
  • A concise one-capsule routine

Pros

  • 50 mg riboflavin 5'-phosphate
  • Active coenzyme form
  • Single-active capsule
  • Clearly disclosed amount

Cons

  • Amount remains far above routine nutritional needs
  • No purity standard is provided
  • No sustained-release feature is listed
  • Costs more than many standard-form options

Warnings

  • Riboflavin can turn urine bright yellow; the color change is expected and harmless.
  • A high-potency serving may cause nausea or loose stools in sensitive users.
  • The active form does not remove the need to avoid unnecessary stacking with other high-dose B-complex products.

Nutrient quality

94 Highest impact

Form quality is favorable because a riboflavin phosphate form is included. A focused ingredient list keeps the formula aligned with its purpose.

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Ingredient transparency

75 High impact

The active form and weight are named, though phosphate yield is not clarified. Full usage directions and inactive ingredients are not supplied.

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Customer satisfaction

70 High impact

Customer ratings are strong with a 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

93 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 (Riboflavin 5-Phosphate)
 50 mg
Adults 18–50 Vegetarian
Report overview
Riboflavin (Riboflavin 5-Phosphate) · 50 mg OverallScore90
A+ Active Ingredient Quality & BioavailabilityB Dose, Safety & Label TransparencyA+ Value

The bioactive riboflavin 5'-phosphate form and quick-dissolving capsule support efficient delivery. A 50 mg listed dose offers high potency at a low cost per serving. The label appears to give only the phosphate compound weight, leaving the actual riboflavin yield unclear.

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83 Performance

BioCoenzymated Riboflavin 5'-Phosphate 50 mg

Natural Factors
<p>Stronger supplied quality and collection evidence favors active riboflavin 5-phosphate at 50 mg over the original’s active riboflavin 5-phosphate at 50 mg. The formula remains closely aligned with riboflavin use, while dose, format, and missing label details remain practical trade-offs.</p>
79 Performance

Riboflavin 5'-Phosphate

Thorne
<p>Stronger supplied quality and collection evidence favors active riboflavin 5-phosphate at 36.5 mg over the original’s active riboflavin 5-phosphate at 50 mg. The formula remains closely aligned with riboflavin use, while dose, format, and missing label details remain practical trade-offs.</p>
74 Performance

Riboflavin 400 mg

Seeking Health
<p>Stronger supplied quality and collection evidence favors active riboflavin 5-phosphate at 400 mg over the original’s active riboflavin 5-phosphate at 50 mg. The formula remains closely aligned with riboflavin use, while dose, format, and missing label details remain practical trade-offs.</p>
83 Budget

B-2 100 mg

NOW
<p>Lower serving cost makes standard riboflavin at 100 mg the more economical riboflavin option. Compared with the original’s active riboflavin 5-phosphate at 50 mg, the supplied formula changes the dose, form, or supporting ingredients, so those differences should guide the choice.</p>
83 Budget

Riboflavin 100 mg

Swanson
<p>Lower serving cost makes standard riboflavin at 100 mg the more economical riboflavin option. Compared with the original’s active riboflavin 5-phosphate at 50 mg, the supplied formula changes the dose, form, or supporting ingredients, so those differences should guide the choice.</p>
83 Budget

Riboflavin Vitamin B2 100 mg

Nature's Way
<p>Lower serving cost makes standard riboflavin at 100 mg the more economical riboflavin option. Compared with the original’s active riboflavin 5-phosphate at 50 mg, the supplied formula changes the dose, form, or supporting ingredients, so those differences should guide the choice.</p>
83 Value

Vitamin B2 100 mg

NaturesPlus
<p>A stronger quality-to-cost balance makes standard riboflavin at 100 mg a practical value alternative to the original’s active riboflavin 5-phosphate at 50 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

Nutricost
<p>A stronger quality-to-cost balance makes standard riboflavin at 100 mg a practical value alternative to the original’s active riboflavin 5-phosphate at 50 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 active riboflavin 5-phosphate at 50 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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