Polyhydroxystearic Acid

Polyhydroxystearic Acid is an oil-soluble polymer of hydroxystearic acid used as an emulsifier and dispersant. It's chosen to stabilize emulsions, keep pigments evenly suspended, and improve slip and appearance, especially in mineral and color cosmetics.
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Ingredient Snapshot

Overview
An emulsifier that keeps pigments suspended for smoother makeup.
Category
Emulsifying
Type
Emulsifier

Ingredient Ratings

Overall Rating

Good

Comedogenic Risk

None

Skin Benefits

Improves spreadability and a silky feel, helping makeup appear more uniform during wear.

Uses In Skincare & Cosmetics

Common in mineral sunscreens, liquid foundations, and primers to keep zinc oxide or pigments moving smoothly on application.

Comedogenic Rating

This ingredient is not typically evaluated for comedogenicity, and no standardized rating is available.

Safety

Considered low risk for irritation at typical use levels. No commonly cited regulatory restrictions for cosmetic use.

Is Polyhydroxystearic Acid a Good Ingredient?

It's rated Good for reliably dispersing pigments and stabilizing emulsions, especially in mineral sunscreens, while improving slip and aesthetics. It's considered inert with low irritation potential, though it primarily supports formulation performance rather than delivering direct skin benefits.

Products with Polyhydroxystearic Acid

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