Vitamin C Chemistry: Stabilizing L-Ascorbic Acid with Ferulic & E
September 2, 2026
•By Clinical Dermatology & Formulation Board•5 min clinical read
Formulation & Clinical Summary
The gold standard antioxidant: formulating 15% L-Ascorbic Acid at pH < 3.5 with 1% Alpha-Tocopherol and 0.5% Ferulic Acid to multiply photoprotection eightfold.
Pure L-Ascorbic Acid is notorious for rapid oxidative degradation. Combining it with lipid-soluble Vitamin E and plant-derived Ferulic acid creates a self-regenerating antioxidant network.
1. Duke Antioxidant Synergy Formula
Low pH Requirement: Formulating at pH 2.8–3.2 neutralizes the ionic charge of L-ascorbic acid, enabling rapid stratum corneum lipid penetration.
Eightfold Photoprotection: The synergistic trio (15% C, 1% E, 0.5% Ferulic) delivers an 8x boost in biological defense against solar erythema and free radicals.
Airless Opaque Delivery: Amber glass and airless pump canisters prevent photo-oxidation and preserve formula potency for 6+ months.
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Clinical Dermatology & Formulation Advisory Board
Our editorial board comprises licensed cosmetic chemists, clinical dermatologists, and botanical pharmacognosy researchers auditing active concentrations, molecular delivery systems, and stratum corneum biocompatibility.
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