Italian scientists have developed a new diet pill that expands in the stomach, causing a feeling of fullness(満腹感). They stumbled upon(偶然出くわす)the discovery while attempting to develop more absorbent(吸収力のある)diaper linings. When swallowed with 2 glasses of water, this small, powdery, hydrogel(ヒドロゲル;寒天、ゼラチン等)pill expands in the stomach to a jelly-like ball. Its swelling fills the stomach, reducing the space available for food. The pill will now undergo testing in overweight volunteers and could be on the market as soon as May 2008.