Polyglycerol esters act as an emulsifier, allowing water and flour to mix. Polyglycerol Esters Also Known as PGEs What are Polyglycerol Esters? Polyglycerol esters of fatty acids (PGEs) are used in food as an emulsifier. PGEs are a class of synthetic, nonionic surfactant frequently used in food, pharmaceutical, and cosmetic industries [...]