L-Ascorbic Acid (Vitamin C) for Redness
L-ascorbic acid can transiently increase redness in rosacea-prone skin at low pH.
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L-ascorbic acid can transiently increase redness in rosacea-prone skin at low pH.
how to use it. Consider stable derivatives (SAP, MAP, THD) for sensitized skin.
why it works. pH-driven flushing; not an ingredient allergy per se.
Reviewed with 1 source on 2026-07-03.
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