Fructose:

Also known as: Fruit Sugar; Levulose
What it is: This CARBOHYDRATE and simple sugar (monosaccharide) occurs naturally in honey and fresh fruits. Because it's twice as sweet as table sugar (sucrose), commercial bakers use fructose in cakes, breads and cookies to make them brown better. And dieters trying to shave calories substitute it for regular sugar in sweets because they need use only half as much. But make a note, fructose can't be subtituted measure for measure for sugar in baked goods because its chemical and physical properties are different. Instead, use it to sweeten puddings, fruits, sauces and ice creams. It's available in many health-food stores.