Polyhydroxystearic acid ek fatty acid derivative hai jo cosmetic formulations mein use hota hai. Yeh mainly dispersing agent aur emulsifier ki tarah kaam karta hai. Iska kaam hai pigments jaise titanium dioxide aur zinc oxide ko evenly distribute karna, especially sunscreens mein. Saath hi yeh oil ko stabilize karta hai aur formulation ko better consistency deta hai.