L-Ascorbic Acid (Vitamin C) during Damaged Barrier
L-ascorbic acid at working pH (<3.5) stings compromised skin. Pause during acute flare.
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L-ascorbic acid at working pH (<3.5) stings compromised skin. Pause during acute flare.
how to use it. Pause LAA during acute flare (persistent stinging on application). Restart at half-frequency once tolerance returns. Consider a buffered vitamin C derivative (SAP, MAP) while rebuilding.
why it works. The acidic pH required for percutaneous penetration of pure L-ascorbic acid is aggravating on a barrier that is already inflamed. Sting on application can amplify sensitization.
Reviewed with 1 source on 2026-07-03.
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