Fructose

Fructose, or fruit sugar, is a simple monosaccharide found in many plants. It is often bonded to glucose to form the disaccharide sucrose. Fructose is found in honey, tree and vine fruits, flowers, berries and most root vegetables. It is absorbed directly into the bloodstream during digestion.

Figure 1: The most common isoform of fructose is a five-membered ring.