POLYHYDROXYSTEARIC ACID is graded A (Safe) by Expert·ING, based on COSING, FDA regulatory data.

POLYHYDROXYSTEARIC ACID

Safety grade: A

This is a modified form of stearic acid, a fatty acid derived from plant or animal oils, that has been chemically altered to help mix oil and water together. It acts like a bridge between ingredients that normally don't blend well.

This ingredient helps stabilize cosmetic formulas by allowing oils and water-based ingredients to mix smoothly together, creating a uniform, long-lasting product texture.

Graded using: COSING, FDA.

Last verified: May 26, 2026