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Types of Vitamin B2 (Riboflavin): Forms & Bioavailability

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Forms Comparison

FormBioavailabilityBest For
Riboflavin (Vitamin B2)ModerateGeneral supplementation — standard form, well-absorbed up to ~27 mg per dose
Riboflavin-5-Phosphate (R5P)HighBioactive form — already converted to coenzyme form, ideal for those with absorption issues

Riboflavin (Vitamin B2)

Bioavailability: Moderate. Best for: General supplementation — standard form, well-absorbed up to ~27 mg per dose.

Riboflavin-5-Phosphate (R5P)

Bioavailability: High. Best for: Bioactive form — already converted to coenzyme form, ideal for those with absorption issues.

References

  1. (). Effectiveness of high-dose riboflavin in migraine prophylaxis: a randomized controlled trial. Neurology. DOI
  2. (). Prophylaxis of migraine headaches with riboflavin: a systematic review. Journal of Clinical Pharmacy and Therapeutics. DOI
  3. (). Riboflavin (vitamin B-2) and health. American Journal of Clinical Nutrition. DOI