Hydroxystearic Acid
Ingredient Info
Hydroxystearic acid is a natural fatty acid derived from castor oil that works as a thickener and emulsifier in skincare products. It helps blend oil and water-based ingredients together and gives formulas a smooth, stable texture.
Benefits
- Creates stable emulsions that blend oils and water smoothly
- Thickens formulas to improve texture and spreadability
- Allows for easier formulation of complex skincare products
Potential concerns
- May cause allergic contact dermatitis in sensitive individuals
- Documented cases of severe contact dermatitis reactions in some people
- Cross-reactivity possible with castor oil and related fatty acids
Science: Recent research shows hydroxystearic acid functions effectively as both a thickener and emulsifier in cosmetic formulations. However, documented cases of allergic contact dermatitis exist, indicating this ingredient can trigger reactions in susceptible individuals, though such reactions appear relatively uncommon.
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