Galacto-Oligosaccharide 70% Syrup (GOS 70%) refers to galacto-oligosaccharides with a purity of not less than 70%, belonging to the category of natural functional oligosaccharides. Its molecular structure consists of 1-7 galactose units linked by 1 glucose unit viaβ-1,4,β-1,6, and other glycosidic bonds. It is typically prepared from lactose through aβ-galactosidase-catalyzed transglycosylation reaction. The remaining small amounts of impurities are mostly unreacted lactose or monosaccharides, which do not affect its core functions.
Physical Properties: GOS 70% is a white or pale yellow odorless powder with excellent water solubility (over 70% solubility at 25℃). Its aqueous solution is clear, transparent, and neutral. It exhibits outstanding thermal stability, not decomposing even after short-term heating at 120℃
. It is stable within a pH range of 3.0-7.0 and can withstand high-temperature sterilization and acidic/alkaline environments during food processing. It is non-reducing and does not readily undergo Maillard reactions with proteins, thus preserving the original flavor and color of food.
Applications: In infant formula, it can mimic human milk oligosaccharides, helping beneficial gut bacteria (such as Bifidobacteria) to colonize; when added to dairy products such as yogurt and milk powder, it can improve taste and extend shelf life; as a prebiotic in health foods, it can regulate the balance of gut microbiota; it can also be used in beverages and baked goods to replace some sucrose, reduce calorie intake, and balance functionality and palatability.
