The structure of AA2G is that the hydroxyl hydrogen atom of the active site of ascorbic acid (the hydroxyl group with reducing properties) is replaced by a glucosyl group. Since the hydroxyl group on the active site of the VC molecule is shielded by glucose, AA2G is non-reducing and more stable than VC under oxidative conditions. . Experiments have proved that AA2G not only overcomes the shortcomings of VC being easily oxidized and unstable, it has excellent stability in the presence of heat, oxygen and metal ions, but also retains the normal activity of VC