Riboflavin 5'-Phosphate
Scored by the Formulate Research Team · Last reviewed July 2026
Overview: Thorne Riboflavin 5'-Phosphate
The bioactive, tissue ready form of riboflavin, necessary for the formation of other B vitamins* Riboflavin 5'-Phosphate is a more readily usable form of B2 than riboflavin.* It is an important cofactor for the activation and conversion of other B vitamins, including niacin and vitamin B6.*
Score Breakdown
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Ingredients per Serving
| Ingredient | Amount |
|---|---|
| RiboflavinRiboflavin 5'-Phosphate Sodium9 systematic reviews · 14 randomised trials | 109.5 mg |
Certifications & Testing
Other Ingredients
Calcium Laurate, Hypromellose (derived from cellulose) capsule, Microcrystalline Cellulose, Silicon Dioxide
Recommended Use
Take 1 capsule one to three times daily or as recommended by your health-care practitioner.
Warnings
ALLERGY WARNING This product is contraindicated in an individual with a history of hypersensitivity to any of its ingredients. PREGNANCY If pregnant, consult your health-care practitioner before using this product. INTERACTIONS There are no known adverse interactions or contraindications at publication date.
Frequently Asked Questions
What is Thorne Riboflavin 5'-Phosphate's Formulate score?
Thorne Riboflavin 5'-Phosphate scores 73 out of 100 (grade B+) on Formulate's ingredient-level rubric, which weighs evidence quality, dose accuracy, bioavailability, transparency, safety, and manufacturing practices.
Is Thorne Riboflavin 5'-Phosphate worth it?
Thorne Riboflavin 5'-Phosphate scores 73/100 (grade B+). That's an above-average result — most of its doses and ingredient forms are well-chosen, with only minor gaps in dosing, transparency, or testing. Formulate grades every product with the same automated rubric, so the score reflects the formula — not marketing or sponsorships.
What's in Thorne Riboflavin 5'-Phosphate?
Each serving contains Riboflavin (109.5 mg). Serving size: 1 Capsule. 60 servings per container.
How do I take riboflavin 5'-phosphate?
Take 1 capsule one to three times daily or as recommended by your health-care practitioner.
Who makes Riboflavin 5'-Phosphate?
Riboflavin 5'-Phosphate is made by Thorne. See Formulate's full grade and product lineup for Thorne on its brand page.
Is Thorne Riboflavin 5'-Phosphate third-party tested?
Thorne lists the following certifications and testing for this product: NSF Certified, Gluten Free, Dairy Free, Soy Free, Thorne Verified, Natural Flavors, Natural Colors, GMP Certified.
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Disclosure. Formulate may earn a commission from purchases made through links on this page. Commissions never influence scores — every product is graded by the same automated rubric. This page is for educational purposes only and does not replace advice from a qualified healthcare provider.