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Hydroxystearic Acid

What Hydroxystearic Acid is & what it does

A fatty acid derivative used to stabilize emulsions and disperse pigments and filters evenly. It helps build smooth, uniform textures.

What does Hydroxystearic Acid do in skincare?

Hydroxystearic Acid is a fatty acid derivative used as a texture and surface agent. In creams and sunscreens it can help thicken, stabilize, or smooth the formula and improve how it spreads. It contributes to feel and consistency rather than acting as an active.

Is Hydroxystearic Acid comedogenic?

Hydroxystearic Acid is a fatty-acid-based ingredient, and reported pore-clogging potential for such materials varies with concentration and the overall formula. It is typically used at modest levels for texture rather than as a heavy oil. If you are acne-prone, lighter products may be a safer choice.

Is Hydroxystearic Acid safe?

Hydroxystearic Acid is a fatty acid derivative widely used in cosmetics and generally regarded as low risk at standard use levels. It is related to stearic acid, a common and well-tolerated skincare ingredient. As always, anyone with specific sensitivities should review the product label.

Sunscreens with Hydroxystearic Acid

We rate 38 sunscreens that contain it, showing the top 10 by overall score:

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