E1521 – Polyethylene glycol
CarrierDescription
Synthetic polymer
Notes
Polyethylene glycol, commonly known as PEG, is a synthetic polymer created by linking together many small molecules of ethylene oxide (derived from petroleum) in a chemical process called polymerization. Think of it like creating a chain by connecting identical links together. The resulting substance can range from a thick liquid to a waxy solid, depending on how long the molecular chain becomes during manufacturing. In food applications, PEG primarily works as a humectant (moisture retainer), solvent, and coating agent. It helps keep foods moist by attracting and holding water, and can dissolve both water-soluble and fat-soluble ingredients, making it useful in creating uniform mixtures. You might find it in baked goods, confectionery, and processed foods, though it's more commonly used in pharmaceuticals and cosmetics than in everyday food products. PEG is entirely synthetic and suitable for both vegetarian and vegan diets since no animal products are involved in its production. It's generally recognized as safe by food safety authorities, but some people may experience digestive upset if they consume large amounts. The food industry typically uses it in very small quantities, and products containing PEG must list it on ingredient labels.