Xylitol is a sugar alcohol sweetener used as a naturally occurring sugar substitute. It is found in the fibers of many fruits and vegetables, including various berries, corn husks, oats, and mushrooms. It can be extracted from corn fiber, birch, raspberries, plums, and corn. Xylitol is roughly as sweet as sucrose with only two-thirds the food energy. As with most sugar alcohols, initial consumption can result in bloating, diarrhea, and flatulence, although generally rather less so than other sugar alcohols like sorbitol.