What it is
This ingredient is an ester of polyhydroxystearic acid with hexaglycerin (polyglycerol-6), giving a PEG-free nonionic emulsifier and dispersant. It is particularly valued for wetting and dispersing inorganic UV filters and pigments, making it common in mineral and tone-up sunscreens, and it helps build stable water-in-oil emulsions. It also contributes to a smooth, even application.
Safety & warnings
Polyglyceryl esters are mild, low-irritation emulsifiers often chosen as PEG-free options for sensitive-skin and mineral formulations. Sensitization potential is low. It is not generally regarded as comedogenic at typical use levels.
Origin & sourcing
Synthetic or semi-synthetic; made by esterifying polyglycerol (from glycerin) with polyhydroxystearic acid, derived from stearic/hydroxystearic fatty acids.
Questions everyone asks
Why is this ingredient common in mineral sunscreens?
It is a PEG-free emulsifier and pigment dispersant that wets and evenly distributes inorganic UV filters for a smoother, less patchy finish.
Is it PEG-free?
Yes; it is built on polyglycerol rather than polyethylene glycol, making it a frequent choice for PEG-free formulas.