Science
Mechanism of Action
Functions as a metabolic precursor that converts to L-ascorbic acid upon skin absorption. Directly inhibits tyrosinase enzyme by targeting Cu2+ ions, preventing L-tyrosine oxidation to melanin. Additionally serves as a cofactor for prolyl and lysyl hydroxylase enzymes, promoting collagen synthesis and structural repair.
Research
Clinical Evidence
High confidence2%
Key findings
- 01 2.0% concentration showed significant skin tone improvement and brightening in human subjects
- 02 At just 0.02% equivalent (1.0 mmol/L), inhibits tyrosinase activity by over 80%, outperforming pure L-ascorbic acid
Transparency
Dusting Analysis
Given proven efficacy at 0.02% and meaningful clinical results at 2.0%, concentrations below 0.1% should be considered inadequate for substantive brightening effects.
The Formula
Formulation
Stability
Exceptional stability profile with 90+ day stability at 45°C. Maintains efficacy under heat and light exposure where L-ascorbic acid would degrade. Citrate buffering at 1% prevents pH drift.
Synergies
- niacinamide
- alpha arbutin
- kojic acid
Conflicts
- strong oxidizing agents
- strong bases
Safety
Safety Profile
CIR reviewed 2017/2024 within ascorbic acid group. Cytotoxicity only observed at 10%+ versus 2.5% for L-ascorbic acid. Rare contact dermatitis cases documented but generally well-tolerated.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Superior vitamin C derivative combining exceptional stability with proven efficacy and universal skin compatibility.
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References
Sources