Sodium riboflavin phosphate is a water-soluble phosphorylated form of vitamin B2 (riboflavin) used in cosmetic formulations as an antioxidant, conditioning agent, and natural yellow-orange colorant. It is more water-soluble than free riboflavin, aiding incorporation into aqueous products.
| Reported effect | How often | Notes |
|---|---|---|
Yellow staining of skin or fabric | Uncommon | Due to the intense yellow color of riboflavin; typically temporary and cosmetic only. |
Mild skin irritation or redness | Rare | Possible in sensitive individuals; generally considered low-irritation at cosmetic concentrations. |
Contact allergy / sensitization | Very rare | Allergic contact dermatitis to riboflavin derivatives is reported only sporadically. |
Photosensitivity-related degradation reactions | Rare | Riboflavin is photoreactive and can generate reactive oxygen species under UV light, a formulation stability concern more than a direct clinical effect. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.