Snapshot
- Overview
- A pH adjuster that keeps formulas stable and consistent to use.
- Category
- Tone/Texture
- Type
- pH Adjuster
Maleic Acid
Maleic acid is a synthetic dicarboxylic acid used in personal care as a functional component to adjust pH, improve stability, and fine-tune viscosity or feel in pH-dependent systems; direct complexion benefits aren't well established.
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Our take
Is Maleic Acid a Good Ingredient?
It works well as a pH adjuster and stabilizer, but direct skin benefits are unproven, and as an acid it can irritate at higher levels or low pH, which is why it lands at Fair.
What it does
Skin Benefits
Helps keep products performing predictably and feeling consistent during application; direct skin benefits are not well established in current research.
Where you'll find it
Uses in Skincare & Cosmetics
Used in toners, serums, and gels to maintain targeted acidity and preserve product texture over shelf life.
Before you use it
Safety
Irritation (tingling, redness) is possible, particularly on sensitive or compromised skin and in low-pH formulas. Avoid use on broken skin and patch test when uncertain.
Products with Maleic Acid
