Sugar feeds our bodies. We can eat a variety of foods and they may taste good or not so good. Still, at some point, simple glucose, fructose, and galactose are the energy sugars that are being absorbed from the food to circulate in the blood to feed the cells. People learning about their health will often find information about glucose meters and the like to measure the sugar levels to be maintained in their blood.

The type of sugar that comes from fruits, commonly called fruit sugar, is fructose. Like other sugars, fructose can bond with simpler sugars to make food taste differently. Fructose is found in fruits, vegetables, honey, flowers, and root vegetables.

Fructose often bonds to glucose to form the disaccharide sucrose. Common table sugar crystals are this disaccharide known as sucrose. Di = two and sacchar = sugary carbohydrates. The term sugar can refer to both monosaccharides and disaccharides. Fructose is the sugar that dissolves most readily in water. It exists as a number of different isotopes, all of which are composed of six carbon atoms.

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