Vitamin
Vitamin B2 (Riboflavin)
Also known as: Riboflavin, Riboflavin-5-phosphate, R5P, B2
Essential B vitamin involved in energy production, antioxidant function, and metabolism of other B vitamins. The active form (R5P) is preferred.
Daily target & upper limit
1.3 mg / dayVitamin B2 (Riboflavin) has an established daily reference intake. See best forms, label synonyms, upper-limit warnings, and top-scoring supplements:
Vitamin B2 (Riboflavin) dosage reference →Primary uses
- Energy production
- Migraine prevention
- Antioxidant support
- B-vitamin metabolism
How it works
- Precursor to FAD and FMN coenzymes
- Required for electron transport chain
- Regenerates glutathione (antioxidant)
- Required for folate and B6 activation
Dosage
- Typical range
- 10-400 mg daily (400mg for migraines)
- Timing
- With food
- With food
- Yes, improves absorption
- Duration
- Safe for long-term use
- Special populations
- Migraine sufferers may need higher doses
Forms
- Riboflavin-5-phosphate (R5P)
- Riboflavin
Safety
Common side effects
- Bright yellow urine (harmless)
- Very well tolerated
Contraindications
- None known
Products containing Vitamin B2 (Riboflavin)
Top-scoring supplements in our catalog that list Vitamin B2 (Riboflavin) on the label. Each product is graded on Formulate's ingredient-level rubric — dose accuracy, form, transparency, and third-party testing.
Evidence notes
Well-established essential nutrient, good evidence for migraine prevention
Grade A: Multiple well-designed human trials support the main claims.
Related in Vitamin
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Open the checkerMedical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider.