One reason the Jello gelatin trick works so effectively is the way gelatin behaves in the stomach. When consumed, it slowly dissolves and creates a light sense of fullness that helps curb hunger for longer periods of time. This is especially beneficial for individuals who struggle with frequent snacking or who feel hungry shortly after meals. Instead of battling cravings, they can rely on a refreshing bowl of gelatin to take the edge off without loading up on unnecessary calories. Jello Gelatin Trick