What it is
This ingredient is formed by esterifying decaglycerol with stearic acid, giving a nonionic, oil-loving surfactant that helps blend oil and water phases into stable emulsions. It is often paired with more hydrophilic polyglyceryl esters to tune the consistency and feel of creams and lotions. Because it is glycerin-derived and nonionic, it is commonly chosen for formulas marketed as mild.
Safety & warnings
Polyglyceryl fatty-acid esters are generally regarded as low-irritation, nonionic surfactants and are widely used in leave-on products. It is not a recognized fragrance allergen.
Origin & sourcing
Synthetic ester made from glycerin (typically plant-derived) and stearic acid, a fatty acid that can come from vegetable or animal sources.
Questions everyone asks
What does polyglyceryl-10 tristearate do in a sunscreen?
It acts mainly as an emulsifier, helping the oil and water portions of the formula stay blended, and it also adds a softening, emollient feel.
Is it the same as a soap or harsh detergent?
No. It is a mild nonionic emulsifier used to structure creams and lotions, not a cleansing surfactant intended to strip the skin.