Fructose is a reducing sugar. Reducing sugars are sugars that have reducing properties. Among sugars, monosaccharides containing free aldehyde or ketone groups in the molecule and disaccharides containing free aldehyde groups are reducing in nature. The main reducing sugars are glucose, fructose, galactose, lactose and maltose. Thus fructose is a reducing sugar. Fructose is a monosaccharide, an isomer of glucose, with the molecular formula C6H12O6, found in honey, fruits, and combined with glucose to form sucrose for daily consumption. Fructose is 1.8 times sweeter than sucrose, making it one of the sweetest of all natural sugars, so intake of fructose is generally only half that of sucrose at the same sweetness level. Fructose can be determined as a reducing sugar by the Ferring’s Reagent method.