Ingredient Encyclopedia

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Discover what’s inside your skincare — from retinol to aloe vera — with clear guides on benefits, uses, and safety.

Ingredient Encyclopedia

Sodium Ascorbyl Phosphate – Benefits, Side Effects & Uses

by ThankMeNow Editors on Sep 10, 2025
Sodium Ascorbyl Phosphate (SAP) is a stable, water-soluble salt form of Vitamin C. While most Vitamin C derivatives focus solely on brightening, SAP is unique for its antimicrobial properties. Research indicates that in concentrations around 5%, SAP can be as effective as some prescription topicals for managing acne-causing bacteria (Cutibacterium acnes). Because it is non-acidic and stable at a pH of 7, it does not cause the stinging or "purging" often associated with pure Ascorbic Acid. It acts as a dual-purpose active: it neutralizes the free radicals that cause premature aging while simultaneously preventing the oxidation of sebum, which is a primary trigger for inflammatory breakouts.