Fructose is a carbohydrate, which, unlike sugar, does not increase the level of glucose in blood, does not cause dental caries. For BAA line. Fructose or fruit sugar (C6H12O6) is a monosaccharide that is present in a free form in almost all sweet berries and fruits. Fructose is a food substance the same, as glucose and sucrose (sugar), but unlike them, requires for its digestion a small amount of insulin. Having the same energy value as sugar, fructose is sweeter and therefore is used in smaller doses, that allows reducing the energy value of various foods and dishes, as well as the need for insulin. Excessive intake of fructose (over 40 g) can cause flatulence, diarrhea, as well as disrupt fat metabolism and increase triglyceride levels in blood.