Ingredient
Trihydroxystearin
What is Trihydroxystearin?
Trihydroxystearin is a fatty acid derivative often used as a gelling agent and thickener in various products. It is synthesized from castor oil through a reaction that introduces hydroxyl groups to the stearic acid backbone.
It is used primarily in cosmetics and personal care products to provide a stable, creamy texture and improve product spreadability. There is limited research on the health effects of trihydroxystearin, but it is generally considered safe for use in cosmetics and topical applications.
When you see trihydroxystearin on a label, it indicates the product may have improved viscosity or thickness, contributing to its overall texture and user experience.
Commonly found in: lipsticks, foundations, creams, lotions
Benefits
- Enhances texture and spreadability in cosmetic products.
Trihydroxystearin is not specifically regulated by the FDA but is generally considered safe for cosmetic use. It does not require pre-market approval.
There is limited peer-reviewed research on trihydroxystearin, but it is generally regarded as safe in the concentrations used in cosmetics.
Trihydroxystearin is typically derived from plant-based sources like castor oil, making it compatible with vegan products.
Sources: Cosmetic Ingredient Review: Safety Assessment of Hydroxy Stearic Acid
Scout's take
Fatty-acid emollient / emulsifier — conditions skin, low concern.
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