answer:http://m.spectrum.diabetesjournals.org/content/17/3/137.full Yes there are. Many the sugars such as aspartame splenda etc reduce satiety and increase cravings. Even though the FDA has approved these sugars there has been increasing controversy on the safety of such items. A good way to get fiber is from nuts or berries or beans. If you are worried about weight and it seems that you are daily bean eaters have been shown to eat less calories a day and not gain the typical two pounds a year. The link I provided has different info covers the topic from a different perspective. It is partially aimed at type 2 diabetics but also includes low carb dieters.