"Sorbitol, also known as glucitol, is a sugar alcohol that the human body metabolizes slowly. It can be 
obtained by reduction of glucose, changing the aldehyde group to a hydroxyl group. Sorbitol is found in apples, pears, peaches, and prunes.[1] It is synthesized by sorbitol-6-phosphate dehydrogenase, and converted to fructose by succinate dehydrogenase and sorbitol dehydrogenase.[1] Succinate dehydrogenase is an enzyme complex that participates in the citric acid cycle."
"Sorbitol is a sugar substitute. It may be listed under the inactive ingredients listed for some foods and products. Sorbitol is referred to as a nutritive sweetener because it provides dietary energy: 2.6 kilocalories (11 kilojoules) per gram versus the average 4 kilocalories (17 kilojoules) for carbohydrates. It is often used in diet foods (including diet drinks and ice cream), mints, cough syrups, and sugar-free chewing gum."
"It also occurs naturally in many stone fruits and berries from trees of the genus Sorbus."