E420 consists of two main components sorbitol and mannitol. Sorbitol, a sugar alcohol derived from the osmotic transformation of glucose, is naturally found in many fruits, such as apples, pears, and berries. Mannitol, while chemically similar, is often derived from algae or produced synthetically. Both compounds share properties that make them useful as sweeteners, humectants (moisture-retaining agents), and texturizers.
Natural Preservatives for Beverages A Sustainable Approach to Preservation