What it is
Polyglyceryl-2 Triisostearate is an ester of polyglycerin-2 and isostearic acid that acts as a water-in-oil emulsifier and emollient. It is well suited to anhydrous and oil-rich systems and is frequently used to disperse mineral pigments and UV filters such as zinc oxide and titanium dioxide, giving a smooth, even application. It is a common choice in mineral sunscreens, balms, and sun sticks.
Safety & warnings
Polyglyceryl-2 Triisostearate is generally well tolerated, with no widely recognized allergenicity concerns; as a rich isostearate ester it is emollient and may feel heavy or contribute to congestion in those very prone to clogged pores, though it is widely used without issue.
Origin & sourcing
Synthetic ester; made by combining polyglycerin (derived from glycerin) with isostearic acid.
Questions everyone asks
What does polyglyceryl-2 triisostearate do?
It works as a water-in-oil emulsifier and emollient and helps disperse mineral UV filters and pigments smoothly.
Where is it commonly used?
It is common in mineral sunscreens, sun sticks, and oil-rich balms where it stabilizes the formula and aids spreadability.