Comparison guide
Riboflavin or riboflavin-5-phosphate?
Riboflavin-5-phosphate is the phosphorylated 'active' form of vitamin B2. Every positive migraine trial used plain riboflavin at 400 mg/day, and most active-form products contain far less than that.
The options, compared
| Option | Evidence | Best for | The honest note | |
|---|---|---|---|---|
| Vitamin B2 (Riboflavin) | Moderate evidence | Migraine prevention in adults | 400 mg/day for at least three months cuts migraine days by roughly 1–2 a month in adults, though not in children; very safe, and the bright yellow urine is harmless. | View |
| Riboflavin-5-Phosphate | Moderate evidence | Not worth the premium | No trial has compared it with plain riboflavin for any outcome, and typical products supply 25–100 mg, well under the studied dose. | View |
Our verdict
If you want to try B2 for migraine prevention, take plain riboflavin at 400 mg/day and judge it after three full months. Skip riboflavin-5-phosphate: it has shown no practical advantage and usually comes underdosed. Neither form improves energy or performance if you are not deficient.