Science
Mechanism of Action
Acts as the immediate biosynthetic precursor to vitamin D3, converting through photolysis and thermal isomerization when exposed to UVB radiation. Simultaneously functions as a skin-conditioning agent by supporting barrier repair mechanisms and enhancing antimicrobial peptide production in the epidermis.
Research
Clinical Evidence
Medium confidence0.5%
Key findings
- 01 Combined with nicotinamide and retinol, demonstrated anti-inflammatory effects and clinical improvement in acne patients over 6 weeks
- 02 Increased skin moisturization by 48.6% at 1 hour and 34.2% at 24 hours in 20-participant study
Transparency
Dusting Analysis
Effective concentrations start at 0.1%, making dusting less common due to the relatively high minimum effective dose required for moisturization benefits.
The Formula
Formulation
Stability
Highly sensitive to UV light, heat, and oxidation. Requires stabilization through lipophilic polymer resins or encapsulation technologies. Must be stored in cool, dark conditions to prevent premature conversion.
Synergies
- nicotinamide
- retinol
- antioxidants
- emollients
Conflicts
- strong oxidizing agents
- highly acidic environments below pH 4.0
- UV exposure without stabilization
Safety
Safety Profile
While not individually assessed by CIR, parent molecule cholesterol is approved up to 5%. Commercial use typically ranges 0.1-2.0% with established safety profile.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Well-researched multifunctional ingredient offering proven moisturization and barrier support across all skin types with excellent safety profile.
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References
Sources