Polyglyceryl-4 oleate is a viscous amber-yellow liquid made from the esterification of polyglycerin with oleic acid. It is 100% plant-derived and environmentally friendly. This ingredient combines the moisturizing benefits of glycerin with the nourishing effects of the nutrients and essential fatty acids found in olive oil. It functions as a water-in-oil emulsifier, emollient, surfactant, and stabilizer.