“The least filling food was croissants, while the most filling was plain white potatoes. The USDA reports that a small croissant and a medium potato both have about 170 calories. This study suggests you’d have to eat about seven croissants, 1,190 calories, to experience the same fullness you’d get from a single potato. The key quality that made a food filling: how heavy its 240-calorie serving size was.”