Polyglyceryl-10 Diisostearate

Polyglyceryl-10 diisostearate is a synthetic emulsifier derived from polyglycerin and isostearic acid. It belongs to the polyglyceryl ester family of emulsifying agents commonly used in cosmetic formulations to stabilise mixtures of oil and water, which would otherwise separate.In skincare products, this ingredient helps create stable textures—from lightweight serums to richer creams—by allowing formulators to blend hydrating water-based components with nourishing oils without the mixture breaking down over time.

Emulsifiers are molecules with a dual nature: one part is attracted to oil, the other to water. Polyglyceryl-10 diisostearate sits at the interface between oil and water droplets, holding them together in a stable suspension. This prevents the typical separation you'd see if you tried to mix oil and water on your own.The result is a homogeneous product with a predictable texture and performance, which also ensures that any active ingredients mixed into the formulation remain evenly distributed throughout shelf life.

This ingredient is present in finished products only—you won't use it as a standalone treatment. Simply use skincare products containing it as directed. If you have acne-prone or sensitive skin and wish to test tolerance, introduce any new product gradually and monitor your skin's response over several weeks.

Polyglyceryl-10 diisostearate is generally well-tolerated and has a good safety profile. Those with fungal acne or very reactive skin should patch test, as some individuals report sensitivity to certain emulsifying agents.