Common Name(s): Sodium riboflavin phosphate,sodium riboflavin phosphate,water-soluble vitamin b2,fmn coenzyme

CAS Number: N/a

DESCRIPTION

What It Does: Provides direct fmn coenzyme activity to skin antioxidant flavoenzymes without requiring the phosphorylation step needed for free riboflavin activation.

Why It's Used: Sodium riboflavin phosphate is selected over free riboflavin for its pre-activated coenzyme status — fmn is the immediate enzyme-active form that binds flavoenzyme apoprotein directly, providing faster antioxidant enzyme support.

How It Works: Fmn (sodium riboflavin phosphate) → direct flavoenzyme apoprotein binding → fadh₂/fmnh₂ reduction potential → glutathione reductase gssg → 2 gsh (primary antioxidant cycle).

Typically Found In: Antioxidant skin care,brightening

TECHNICAL DETAILS

Primary Category: Active ingredient – antioxidant

Secondary Functions: Free radical scavenging,anti-aging

Application Areas:

Typical Concentration Range: 0.01%–1%

SOURCING & ETHICS

Vegan Status: Yes

Halal Status: Yes

Source Notes: Plant-derived extract or synthetic.

SKIN COMPATIBILITY

Irritancy Rating: 1/5 – very low

Comedogenicity Rating: 0/5 – non-comedogenic

Sensitivity Concerns: Non-irritating; well-tolerated.

Safe for Sensitive Skin: Yes

SAFETY & COMPATIBILITY

Safety Profile: Excellent safety profile. ewg score: 1.

Works Well With: Vitamin c,vitamin e,ferulic acid,spf,other antioxidants

Avoid Combining With: No significant incompatibilities

SCIENTIFIC NOTE

Sodium riboflavin phosphate is fully water-soluble and avoids the characteristic yellow colour management issues of free riboflavin in colourless formulations.

Last Verified: 2026-03-22

Primary Sources: Cosing database,sodium riboflavin phosphate fmn vitamin b2 review