Polyhydroxystearic Acid
A fatty dispersant and emollient. It helps spread mineral filters and pigments evenly and softens texture. Well tolerated.
Evidence by route
Topical application
A functional dispersant and emollient. Safe.
- CIR Cosmetic Ingredient Review safety assessment
How to read tiers A–F
- BLimited evidence. One RCT or several controlled studies with limitations
Tolerability and safety
- Irritation potential
- Low
- Allergen risk
- Low
- Pregnancy
- Safe
- Suitable for
- Normal, Dry, Combination, Oily, Sensitive
About this ingredient
Polyhydroxystearic Acid is a derivative of stearic acid with hydroxyl groups. INCI: Polyhydroxystearic Acid. In a formula it works as a dispersant and stabilizer: it evenly spreads and keeps pigment and mineral UV-filter particles suspended, prevents them from clumping, and improves texture and spread. It is a functional component, not a skincare active. It often appears in sunscreens and color cosmetics. Pregnancy safety. Systemic absorption through intact skin is low and there is no evidence of harm. It can be used during pregnancy and lactation. Tolerance. Irritation and allergen potential are low, suitable for sensitive skin.
Frequently asked questions
Is Polyhydroxystearic Acid safe during pregnancy?
Polyhydroxystearic Acid is considered safe during pregnancy at typical cosmetic concentrations. Systemic absorption through the skin is minimal.
What skin types is Polyhydroxystearic Acid for?
Polyhydroxystearic Acid suits: normal, dry, combination, oily, sensitive.
What is Polyhydroxystearic Acid and what does it do in cosmetics?
A fatty dispersant and emollient.
Is Polyhydroxystearic Acid comedogenic?
On the Fulton scale 1/5 – very low comedogenicity. For acne-prone skin, a rating of 3 or higher suggests choosing an alternative.
What's the INCI name for Polyhydroxystearic Acid?
The INCI name is Polyhydroxystearic Acid.
See Polyhydroxystearic Acid in a product composition right on the store page
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