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Ex vivo Cutaneous Absorption Assessmentof a Stabilized Ascorbic Acid Formulation Using a Microdialysis System
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Ex vivo Cutaneous Absorption Assessmentof a Stabilized Ascorbic Acid Formulation Using a Microdialysis System
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Ex vivo Cutaneous Absorption Assessmentof a Stabilized Ascorbic Acid Formulation Using a Microdialysis System
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Journal Article
Ex vivo Cutaneous Absorption Assessmentof a Stabilized Ascorbic Acid Formulation Using a Microdialysis System
2004
Overview
Background: Reactive oxygen species generated by ultraviolet light result in photocarcinogenic and photoaging changes in the skin. Antioxidants protect the skin from these insults. Objective: The aim of this study was to determine the ex vivo ascorbic acid penetration and its degradation in the skin after its topical application from an 8% new formulation. Method: Ascorbic acid was applied to human skin fragments. Ascorbic acid and its metabolites were collected by microdialysis and assessed by gas chromatography mass spectrometry. Results: After topical application of the new formulation, the ascorbic acid level achieved was 8.5% higher than the normal tissue value. This high ascorbic acid dermal concentration remained constant if a topical application was made every 8 h. No degradation of ascorbic acid was detected. Conclusion: Ascorbic acid penetrates rapidly after its topical application. The persistent reservoir of ascorbic acid provides an important and attractive photoprotection strategy.
Publisher
S. Karger AG
